The foibles and trials of relationships have always made for compelling comedic cinema.

From the silent movies of Charlie Chaplin to Judd Apatow-produced films like "Knocked Up" and "The Big Sick," the romantic comedy genre has evolved with and adapted to each generation.

To find out which rom-coms have received the most critical acclaim, we turned to the reviews aggregator Rotten Tomatoes for its historical ranking of the genre.

The site ranked each film by a weighted adjustment of its average critic score to account for variation in the number of reviews each movie received.

Here are the 27 best romantic comedy movies of all time, according to critics:

SEE ALSO: All 49 of Netflix's notable original movies, ranked from worst to best

27. "Obvious Child" (2014)

Critic score: 90%

Adjusted score: 95.757%

Audience score: 72%

Summary:"A twenty-something comedienne's unplanned pregnancy forces her to confront the realities of independent womanhood for the first time."

26. "Moonstruck" (1987)

Critic score: 92%

Adjusted score:96.27%

Audience score: 81%

Summary:"Loretta Castorini, a bookkeeper from Brooklyn, New York, finds herself in a difficult situation when she falls for the brother of the man she has agreed to marry."

25. "High Fidelity" (2000)

Critic score: 91%

Adjusted score:96.812%

Audience score: 90%

Summary:"Rob, a record store owner and compulsive list maker, recounts his top five breakups, including the one in progress."

• 10 people have died inside the White House in the 218-year history of the building.
• The list includes two presidents — William Henry Harrison and Zachary Taylor.
• Three first ladies and one first child — Willie Lincoln — also died inside the White House.

The White House has had thousands of occupants over the years, from presidents and first families to White House staffers, chefs, and groundskeepers.

So it's something of a marvel that in the 218-year history of the White House, only 10 people are known to have died inside the building, according to the White House Historical Association.

That short list includes two presidents, three first ladies, and one first child — Willie Lincoln, the third son of Abraham Lincoln, who died of typhoid fever in what is now the President's Dining Room.

Read on to learn about Lincoln and the nine other people who took their final breath in America's most famous residence.

SEE ALSO: A look inside the White House — America's best-known residential address

DON'T MISS: Here's how newspapers reacted when William Henry Harrison died after just 31 days in office

William Henry Harrison, president — April 4, 1841

The first person to die in the White House was William Henry Harrison, the ninth president of the United States.

Harrison's death — just 31 days into his presidency — marked the first time a president died in office. It's commonly thought that Harrison died of pneumonia after catching a cold while delivering his inaugural address, which lasted a record-setting 105 minutes.

Modern researchers, however, have argued that Harrison actually died from intestinal fever contracted from the White House's tainted water supply — the same source that may have killed two other presidents from the same era.

Letitia Tyler, first lady — September 10, 1842

Letitia Christian Tyler, wife of 10th president John Tyler, died of a stroke in 1842, making her the first first lady to die in the White House.

Three years earlier, she suffered a stroke that left her almost completely disabled, leaving her daughter Priscilla Tyler to perform White House hosting duties when John Tyler became president. Priscilla became the de facto first lady following Letitia's death until the president remarried in 1844.

Priscilla described her mother as "the most entirely unselfish person you can imagine,"according to the White House Historical Association.

"Notwithstanding her very delicate health, mother attends to and regulates all the household affairs and all so quietly that you can't tell when she does it."

Zachary Taylor, president — July 9, 1850

America's 12th president, Zachary Taylor, died in the White House in 1850, becoming the second president to die in the building after William Henry Harrison.

Taylor died of a digestive ailment he likely contracted five days earlier, on July 4, when he consumed large amounts of raw cherries and iced milk on a hot day in Washington, DC. Modern historians argue that like Harrison and James Polk, Taylor died from a stomach disease caused by Washington's unsanitary water supply.

A beloved coastal city on the southern tip of Africa is just months away from running out of fresh water. 

Cape Town is rapidly draining its remaining water resources, and soon its biggest dam, the Theewatersklooof, will be bone dry. 

Some residents have started coming up with new ways to meet their water needs as the region struggles through its third year of drought. Many who can afford to do so have started digging private backyard wells. Others are carrying jugs to local breweries, where beer-makers have begun to share the spring water they normally use to make more potent drinks.

Those efforts seem to be working, at least a little. The city recently pushed back it's "Day Zero" target from April to May, and then again from May to June, which means the roughly 4 million Capetonians will have another two months of running water before the city's reservoirs get so low that most taps will be shut off.

But the dams are still draining, and with no substantial rainfall in the forecast, time is running out. This batch of aerial photos shows how the crisis has unfolded.

SEE ALSO: A major South African city is about to run out of water, and officials say it will be the worst disaster since 9/11

The Theewaterskloof dam is Cape Town's largest. In 2011, it was full of water and rimmed with greenery.

But by 2015, when the drought was getting underway, patches of land around the dam were beginning to brown.

NASA says just 325 millimeters of rain fell that year, much less than the 515 the area normally gets.

By 2016, annual rain totals were even lower than normal, and the shoreline of the dam was visibly receding on all sides.

That year, the region recorded 221 millimeters, less than half of what was expected. By 2017, the Cape Town airport recorded less than 160 mm of annual rain. Hydrologist Piotr Wolski from the University of Cape Town calculated that a two-year string of dryness this severe should only happen once every 1,150 years.

Dating isn't easy these days — it's a lot of scrolling, swiping, and game-playing. Simply meeting someone is half the battle, but afterwards you're tasked with coming up with date ideas, which makes things even harder.

Sure, you could take them to a movie or a nice dinner — those will always be classics — but if you really want to impress them, you've got to think outside the box.

Luckily, there are tons of creative first date ideas for people on every budget and from any city. They're unique, unconventional, and (almost) guaranteed to help you learn more about your date. 

Here are 23 first date ideas that are sure to impress: 

1. Take a baking or cooking classes

Places like Sur la Table offer gourmet classes and "date nights" weekly. 

2. Go to a specialty bar

Whether it's a themed bar, a bar that lets you create your own drink, or something undercover like a speakeasy, it'll take "grabbing drinks" to a whole new level.

3. Volunteer together

Doing a beach clean-up, working at a soup kitchen, or helping build a house will reveal how caring the person you're dating is and it'll get your relationship started on the right foot. 

If you've ever fantasized of being in a French romance, it may be different than how you imagined. In terms of the progressive dating culture that exists today in the United States, dating in France is very much a traditional experience.

"The French remain eternally classic and old-fashioned in their manners like their dating norms,' relationship expert Margaux Chetrit told INSIDER.

To get a better grasp of the culture, we've compiled a list of the major differences between French and American dating.

SEE ALSO: A psychotherapist explains how to use your anxiety to improve your performance at work

The French don't call it dating

Strangely enough, they actually don't even have a word for 'date' in France. The closest equivalent for going on a date would be a 'rendez-vous galant,' translating to 'appointment,' according to Jennifer Seiter, a relationship therapist. But most French men would consider that term to be too old fashioned, Seiter added.

The French would prefer to say something like "I'm seeing someone,' said Fiurenzu SANNA, marketing and public relations specialist.

They typically go on group dates

In French 'dating,' it is not atypical to be asked out in group settings versus a one-on-one get together, stated on Expatica.

It's a much more laid-back experience, different from American dating. For instance, the French commonly go to dinner parties with single friends and couples simply to enjoy each other's company, according to Expatica.

In meeting someone of interest in a group, you may then be asked to go to another group hangout or for an afternoon walk together, according to Complete France.

In France, they never just ask strangers out

Though not uncommon to be asked out by your waiter or your barista in the States, in France you would never ask someone out who you've known only for a few minutes, according to Seiter.

The French will only ask you out after they have gotten to know you very well, Seiter added.

Who better to inspire celebrity musicians than other celebrities? Thanks to high-profile love affairs, or mere cultural fascination, musicians have a knack for weaving stories and tidbits about their fellow performers — be it other musicians, movie stars, models, or politicians — into their lyrical odes.

Sometimes the songs are complementary, sometimes cruel they're cruel. And sometimes the true identity has never been confirmed, but only guessed at by rabidly curious fans.

Here's a collection of 12 beloved songs that were (or reportedly were) inspired by celebrities.

"Hearts and Bones" by Paul Simon / Carrie Fisher

In her autobiography "Wishful Drinking," the late, great Carrie Fisher said of former husband Paul Simon, "If you can get Paul Simon to write a song about you, do it. Because he is so brilliant at it."Fisher and Simon married a few months before the release of the song, and the album of the same name it appeared on.

Lines like "the bride was contagious"certainly bring to mind the famously eccentric Fisher, and "one and a half wandering Jews"is also a direct reference (Simon is fully Jewish, Fisher is half).

"In Your Eyes" by Peter Gabriel / Rosanna Arquette

It's been long-suspected that Gabriel's famous romance track "In Your Eyes"was written about his former girlfriend, Rosanna Arquette, who he lived with for many years. 

"In Your Eyes"is probably best-known as the song that plays in "Say Anything" when John Cusack holds his boombox above his head for Ione Skye. The director, Cameron Crowe, has said that Arquette convinced Gabriel to let him use it in the film.

"You're So Vain" by Carly Simon / Warren Beatty

For decades, the identity of the man in Simon's famously bitter tune was only speculated about. Many thought Mick Jagger was the vanity-obsessed culprit, though Simon has vehemently denied this.

Over the years, the singer has revealed that the song is in fact about three men, and in 2015 confirmed that at least one of the verses is about Warren Beatty, whom she had a brief relationship with in the '70s. The identity of the other two is still unknown.

• The USS Growler was the US Navy's first attempt to create a submarine that could a nuclear missile.
• The submarine was commissioned from 1958 to 1964. It now rests in New York City at the Intrepid Sea, Air, and Space Museum.
• The submarine was integral as a nuclear deterrent during the Cuban Missile Crisis in 1962.

The USS Growler, along with sister ship the USS Grayback, was the US Navy's first attempt to create a purpose-built submarine that would act as a nuclear deterrent.

Commissioned in August 1958, it was the second and final of the ships in the Grayback class, which were unusual due to the fact that they were diesel-electric submarines equipped with Regulus I nuclear cruise missiles. The missiles were powerful enough to wipe out New York City, along with parts of New Jersey, Long Island, and Westchester.

The US Navy shifted its nuclear deterrence program shortly after towards nuclear-powered submarines and submarine-launched ballistic missiles. The submarines became obsolete by the mid-1960s with the commissioning of the George Washington class of nuclear-powered ballistic missile submarines in December 1959. 

With an operating range of about 300 miles, the sub operated close to the Soviet Union's shores during its time, putting it squarely in harm's way.

We recently got a chance to tour the historic sub as it was docked at New York's Intrepid Sea, Air, and Space Museum, where it has laid since 1989. Climb aboard for a closer look:

SEE ALSO: Why the Special-Forces-designed Tough Mudder course Is so crazy

The USS Growler was one of the United States' early attempts to create a submarine that could carry out nuclear deterrence. This is the ship on launch day in April 1958 in Portsmouth Naval Yard in Kittery, Maine, where it was built.

Today, it rests in New York, having been decommissioned in 1964. The sub was unique because it carried a Regulus I cruise missile armed with nuclear warheads. The sub had to surface to fire the missile.

This missile hangar is where the sub stored two of its four Regulus I missiles. The Regulus I warhead was 50 times more powerful than the bombs dropped on Hiroshima and Nagasaki combined. The launch process took 15 to 30 minutes.

I've been living with the $650 TCL P607 for over a month, and it's a fantastic TV.

It's a 55-inch TV with ultra-sharp 4K resolution, HDR10 for great picture color, and it even has Dolby Vision for content that supports it, which is an even better version of HDR10.

It also has Roku built in, which handily outclasses the built-in software that most smart TVs come with.

The TCL P607 isn't the cheapest 55-inch 4K TV with HDR, but it's close. And most TVs with this kind of extended feature set, including Dolby Vision, can easily cost north of $1,000.

Check out what I thought of the TCL P607 TV after using it for a month:

SEE ALSO: Why Netflix videos look so much better than cable TV

The TCL TV makes 4K and HDR video look just as good as more expensive TVs.

4K TV shows, movies, and games look stunning on the TCL. 

The TCL has 72 local dimming zones, which means it can dim or turn off certain zones of the screen that show a dark scene. As a result, the color black is surprisingly deep for a regular LCD TV. It's not an OLED display where every pixel acts as a local dimming zone, so it doesn't get that perfect black color in darker scenes, but the TCL is remarkably close. Having such deep black levels makes for a richer picture, and brighter parts of a scene can truly pop, too. 

With that said, the dimming zones can lag when scenes suddlenly switch from dark to bright. Parts of the screen can stay dim for a split second before switching back to bright. It's noticeable, but not really distracting. 

It supports HDR10 and Dolby Vision, which you usually find on more expensive TVs.

The TCL also supports HDR10 and Dolby Vision, which make for more natural colors on content that supports HDR. It also helps reveal detail in darker parts of a scene that you normally wouldn't see on a TV without HDR.

I should note that most HDR TVs only support the regular HDR10 standard while relatively few TVs support Dolby Vision, which is a kind of "premium" version of the standard HDR10 that's usually found on higher-end TV models. The Dolby Vision badge can ramp up the price of a TV, but it hasn't done so with the TCL. 

I was surprised to find that Dolby Vision does actually look better than regular HDR10. The enhancements to color and detail are more noticeable than they are with regular HDR10, and it's always a treat when I find a show or movie that supports Dolby Vision on Netflix. 

I should also note that most streaming devices only support HDR10, not Dolby Vision. So the TCL, as a streaming device, is better than most streaming devices if you value Dolby Vision. So far, only the Apple TV 4K supports Dolby Vision.

If you want better TV quality, the next best thing are OLED TVs, which usually come with a huge price tag.

I found that I enjoyed content with the $650 TCL just as much as I did with the $5,500 LG OLED TV I tried out a few months ago. 

TCL may not be a household name like LG or Sony, but don't let that scare you. The Chinese brand has existed for decades. It recently made a splash in the US TV market with its Roku-powered smart TVs, and it's made a name for itself as a great budget-friendly brand for TVs.

• Amazon's enormous ambitions have led it to expand from online retail into film and television production, advertising, and cloud computing, among other industries.
• While it may seem that no business is safe from Amazon, a 2017 investor survey from Morgan Stanley Research indicated that some industries may not be threatened by Amazon in the near future.
• Those industries include auto parts, beauty, and home improvement.

It's no secret that Amazon is a major threat to many businesses.

From its humble origins as an online bookseller, Amazon has expanded its business into groceries, streaming, cloud computing, advertising, and film and television production, to name a few. In the wake of reports that the company will start a package-delivery service to compete with UPS and FedEx, it may seem that no business is safe from Amazon.

That may not be true, according to a 2017 investor survey from Morgan Stanley Research. Investors indicated that these eight industries are the least likely to be threatened by Amazon anytime soon.

SEE ALSO: I tried Prime Now, Amazon's 2-hour delivery service — and I discovered a glaring flaw

Dollar stores

Shoppers at dollar stores care about price and location more than anything else. While Amazon is making efforts to improve shipping speeds from its warehouses and from its third-party suppliers, it can't beat the prices that dollar stores offer. And at $99 each year, Prime is not feasible for those on a tight budget. 

Auto parts

Though Amazon can deliver auto parts quickly and affordably, they don't have the connections to dealerships that auto part companies like AutoZone have. Auto part shoppers also prefer the expertise provided by dedicated auto part retailers, which Amazon can't match.

Home furnishings

While some home shoppers are willing to buy furniture online without seeing it in person, others prefer home furnishing stores that allow them to get a better sense of how a couch or dresser might look in their home.

Amazon added an augmented-reality feature to its iOS app in 2017 to address this problem, but it may not be enough.

• GoCompare.com compiled a list of the most filmed locations in romantic movies, using data from IMDB.
• The data limited the movies to the last 20 years, and only included movies filmed on location.

With Valentine's Day (and unfortunately a new "Fifty Shades" movie) upon us, love is in the air. But there are some cities where it seems to be more prevalent than others, at least according to Hollywood movies.

Insurance site GoCompare.com crunched data to determine the most filmed locations for movie romances, based on IMDB data from over 340,000 movies. The company developed a platform that restricted the data to movies from the last 20 years, and included only movies filmed on location.

There are a few caveats with the data. While the IMDB data was fairly comprehensive for Hollywood movies, it often was missing information about Bollywood films, especially in terms of on-location filming. So Mumbai is probably undercounted (it comes it at No. 6).

That said, it's still interesting to see the cities moviemakers think are full of love.

Here are the top 7 places:

SEE ALSO: The 20 most romantic movies on Netflix you'll actually want to watch

7. Barcelona, Spain

As seen in: "Vicky Christina Barcelona" (2008), "The Spanish Apartment" (2003), "Biutiful" (2010)

Number of romantic movies filmed on location here: 15

6. Mumbai, India

As seen in:"Slumdog Millionaire" (2008), "Bride and Prejudice" (2004)

Number of romantic movies filmed on location here: 18

5. Brooklyn, New York

As seen in: "Enchanted" (2007)

Number of romantic movies filmed on location here: 19

• Good knives should be the first thing on your list
• Nonstick pans and cooking utensils that won’t scratch them are a must-have
• If you dream of making your own spice blends, you need a coffee grinder
• When you’re ready to up your flavor game and don’t mind spending a little time on care, move up to cast iron

There are few things more universally-comforting than delicious food smells coming from your kitchen. Knowing that you’ll soon be eating those mouth-watering treats is a close second.

But first, you have to make the food. To do that, you’ll need a few key tools to set you up for success. INSIDER spoke with some chefs to gather all the information you need to know on the everyday essential items you should have in your kitchen.

Good knives

Unless you never cook or bake at all, you need good knives in your kitchen. From bread to meat to veggies to blocks of chocolate, a good knife might be the single most versatile tool you can own.

“My go-to knife is a Misono UX10,” Chef Soleil Ho told INSIDER. One great feature of the Misono UX10 is that it’s available in both left- and right-handed versions. Be aware that not all knives are ambidextrous, so you should shop carefully if you’re left-handed.

A sharp set of kitchen shears

As with knives, not all kitchen shears are created equal. Choose a pair that stays sharp for a reasonably long period of time, and also comes apart for easy cleaning. Most professional knife sharpening services can handle your good kitchen shears as well when they start to get dull.

“You can cut up nori, peel and devein shrimp, and way more with them,” Chef Ho told INSIDER.

They’re also great for quickly snipping fresh herbs of all kinds. You don’t need special multi-bladed herb scissors, either; a regular good set of kitchen shears does the job nicely.

A coffee grinder reserved exclusively for spices

If you want to go old-school with a mortar and pestle, that’s great.

But if you want speed on your side, having a coffee grinder that you use for fresh spice blends is ideal, said Chef Ho.

If you like to grind your own coffee, it’s probably a good idea to have a separate grinder reserved exclusively for spices. Otherwise, you’ll spend a lot more time cleaning your grinder before you switch between items than you will grinding.

Do you want to experiment with making your own special chili spice blend? How about a great rib rub? All things are possible when you have an efficient way to grind your own spices.

The 2018 Winter Olympics are underway in Pyeongchang, which means the pressure is on for the competing athletes to not only deliver athletically, but, in the case of figure skaters, aesthetically too.

Over the years, fans have witnessed a parade of vibrant figure skating costumes, each designed to immortalize the skaters wearing them.

But even in a sea of bedazzled illusion sleeves and sheer panels, these 30 costumes have tested the ISU's official dress code, and therefore manage to stand out as the most risqué figure skating costumes of all time. 

Katarina Witt's infamous blue dress at the 1988 Olympics is the reason figure skating now has a dress code.

"The Katarina Rule" dictates that women's hips, midriffs, and butt are covered. 

Tanith Belbin's bedazzled red dress and Benjamin Agosto's plunging neckline pushed the boundaries of said dress code.

Oksana Domnina and Maxim Shabalin's "Aborigine inspired" outfits were deemed offensive.

Domnina and Shabalin's outfits were purportedly meant by the skaters to be Aboriginal, but were instead denounced as offensive and exploitative.

Additionally, the ISU states: "At ISU Championships, the Olympic Winter Games, and International Competitions, the clothing of the Competitors must be modest, dignified and appropriate for athletic competition — not garish or theatrical in design. Clothing may, however, reflect the character of the music chosen."

The Insider Picks team writes about stuff we think you'll like. Business Insider has affiliate partnerships, so we get a share of the revenue from your purchase.

The Insider Pick:

• No matter how many people are in your household, you need to have a thermometer on hand because everyone, at some point, will get sick. A reliable thermometer is a must-have for assessing just how ill a person is and the iProvèn Thermometer is the best one you can buy because it has two temperature reading functions that guarantee a quick, accurate reading.

The ability to quickly and accurately determine a person's body temperature is imperative for assessing their condition during an illness, after an injury, or in the event of exposure to inclement conditions. Whether you're dealing with a temperamental toddler, a non-responsive accident victim, or anyone in between, when you are trying to determine what is wrong with a person and to gauge the severity of the issue, you need to use a thermometer as part of your diagnostic process.

And don't worry: The temperature-reading part of said diagnostic process is remarkably easy thanks to modern thermometers. Gone are the days of sticking a mercury thermometer under the tongue and waiting for five minutes, only to hold the slender glass cylinder up near a light and twist it back and forth in a vain attempt to spot the little strip of risen liquid and figure out what number it's at.

The thermometers in our guide get readings in a host of different ways — from quick ear insertions to use of the underarm to no-touch remote readings taken from the brow — but they all get results fast and with minimal chance of error.

If you have a newborn, we have a few great thermometer options for new parents. If you're a paramedic (or an office manager) planning ahead for first aid treatment that might involve multiple people in tough circumstances, we've got a great thermometer for you, too. And for the rest of us, who just want to know what if we have a fever, we have plenty of choices for you, too.

Read on in the slides below to learn why the iProvèn Medical Ear Thermometer is our top pick and why you might also like the Equinox International Non-Contact Infrared Forehead Thermometer, the Braun ThermoScan5 Digital Ear Thermometer, the ANKOVO Medical Digital Thermometer, and the First Aid Only Pac-Kit Disposable Thermometers.

SEE ALSO: The best first aid kits you can buy

The best thermometer overall

Why you'll love it: The iProvèn Medical Ear Thermometer also has a forehead infrared sensor, so it's ideal for cross-referencing measurements to get accurate temperature readings.

The iProvèn Medical Ear Thermometer is the most expensive thermometer in our guide, but it really is an ideal choice for most homes.

What makes this a good thermometer? First, it's remarkably easy to use. You operate the thermometer with a single press of a button, and readings are quickly displayed on a large, clear LCD screen. Second, the thermometer can take readings in two ways. And finally, an automatic fever alarm takes the guesswork out of the equation.

The first method for attaining a temperature with this thermometer is to use its ear canal probe. You gently insert the ear probe, press the Ear button, and get your reading. To use the infrared forehead sensor, you pop on the infrared lens attachment, press the Head button, then either gently drag the sensor across the forehead or lightly tap it to several spots on the brow.

Using the ear probe will get you the most accurate results in the most efficient manner possible, but might not always be a viable method of getting a reading. While the infrared sensor requires leaving the thermometer in the room where it will be used for about a half hour prior to a measurement (this ensures it is at the room's temperature and thus can accurately determine body heat as a contrast), gently resting the sensor again the head of a resting (or slumbering) patient will be minimally invasive and is an ideal option with babies.

With more than 3,600 reviews posted on Amazon, this thermometer still gets a better than four-star average rating. One parent says the iProvèn Medical Ear Thermometer was "worth every penny" and "great to use for a sick baby." An owner named Gary said the thermometer made it "so easy to get a quick accurate reading."

The product review team from Wiki.Ezvid noted the "user-friendly design" of the iProvèn Medical Ear Thermometer, while a writer with ParentsNeed called the unit's fever alarm a great help in determining "if your little one is sick."

Pros: Dual measurement functions, easy operation, automatic fever alarm

Cons: Infrared sensor requires 30-minute calibration

Buy the iProvèn DMT-489 Medical Ear Thermometer on Amazon for $33.20

The best non-contact thermometer

Why you'll love it:  The Equinox International Non-Contact Infrared Forehead Thermometer can take body, surface, and ambient temperature readings all without ever touching the object.

Ironically, the Equinox International Non-Contact Infrared Forehead Thermometer is ideal for use with two types of people in your life who couldn't be much more different than one another. The first is your very own precious child, and the second is a total stranger. That's because this is a completely non-touch tool.

Thus it's ideal for leaving a sleeping baby undisturbed or for taking the temperature of someone for whom you wish to care but whom you don't necessarily want to touch, due to the risk of contaminating your diagnostic equipment.

For use in taking a person's temperature, the Equinox International Non Contact Infrared Forehead Thermometer must simply be held an inch or so away from the forehead for about one second. It will then display the temperature over a green background if the reading is nominal or over a red background if fever is detected.

In both cases, the information is recovered without disturbing the patient. The device records more than 30 past readings, so you can track the progress of an illness over time.

But this thermometer is also notable as a tool for recording temperatures outside of the body. It can be used to check ambient room temperature, which is important for keeping people safe and comfortable, and it can also test the surface temperature of things such as food and beverages, which is important for child safety or simply for dining pleasure.

After more than 250 ratings, the Equinox International Non-Contact Infrared Forehead Thermometer has a solid 4.4 out of five-star score. A buyer who happens to be a nurse called it "very accurate," while a dad named Carl loved that a "baby doesn't have to be awake" during use.

A MedConsumers write up called this Equinox International thermometer an "excellent" tool that provides results "in less than a second" and noted that it is accurate to within 0.3 degrees.

Pros: No contact needed for use, also records surface and ambient temps, stores multiple past readings

Cons: Occasional inconsistent readings

Buy the Equinox International Non-Contact Infrared Forehead Thermometer on Amazon for $21.97

The best ear thermometer

Why you'll love it: What the Braun ThermoScan5 Digital Ear Thermometer lacks in a wide range of functions, it makes up for in accuracy and reliability.

If you just want an exceptionally good thermometer that's easy to use, reliable, and will last for years, then the Braun ThemoScan5 Digital Ear Thermometer is the one for you.

This is one of the most basic digital ear thermometers out there, yet it's also the second most expensive one on our list. Why? Because this thermometer is reliable, accurate, and built to last for years. Thanks to that accuracy and durability, it's a number one pick for use in pediatrician's offices and is the go-to choice for families all around the nation and beyond.

Part of the reason this device is so accurate is the pre-warmed tip, a feature that not only helps with precise measurements but that also makes the experience of having a temperature taken less unpleasant for the patient. The thermometer also emits a beep and lights up once good ear placement is achieved, so you know the measurement recorded is as accurate as possible.

Because the Braun ThemoScan5 Digital Ear Thermometer uses disposable ear probes, you can minimize the chance of spreading germs from one person to the next. This thermometer only has a single memory function and only takes temperatures in one manner, but it's easy to use, reliable, and will last and last.

This digital thermometer is a favorite with thousands of families. One owner named James loves how easy it is to toggle between Celsius and Fahrenheit, as he and his wife understand the two systems better, respectively. A mom named Cathlene praised it as "always ready ... whenever needed" by her family members.

A ConsumerSearch review called it a "top pick" thanks to the pre-warmed tip and quick results. In its review, ViveHealth said the Braun ThermoScan5 provided "higher levels of accuracy" than many competitors.

Pros: Excellent accuracy, lasts for years, replaceable covers limit germ spreading

Cons: Screen is not backlit

Buy the Braun ThermoScan5 Digital Ear Thermometer on Amazon for $33 (originally $49.99)

Buy the Braun ThermoScan5 Digital Ear Thermometer from Walmart for $37.99

The Winter Olympics have brought tens of thousands of people from around the world to Pyeongchang, South Korea.

But not all of them will know the ins and outs of Korean culture, and if they're not careful, they might find themselves in some embarrassing situations.

The anchors of NBC's "Today" show got a crash course in Korean etiquette on Monday from Korean-American blogger Mina Oh, who taught them why it's OK to ask a Korean person how old they are and why you should never leave your chopsticks standing vertically in a bowl of rice.

Here's what they discovered:

SEE ALSO: American luger Emily Sweeney suffered a terrifying-looking crash when her sled wobbled out of control

Age is really important to Koreans

Korean social hierarchy is based on age, so when two strangers meet, it's important to establish which person is older. 

Often, the first question two strangers will ask each other is "What year were you born?" Oh said.

Age is reflected in the Korean language — Koreans use special honorifics and grammatical forms when speaking to elders.

"Depending on how old you are, they'll address you differently," Oh said. "They'll change the way they talk and the way they act towards you."

Koreans bow to each other — and there are levels of bowing

Bowing is a sign of respect in Korean greetings.

But the way Koreans bow isn't random — the deepness of the bow carries meaning, Oh said.

"The deeper the bow, the more formal the situation," she said.

In casual settings, it's appropriate to give a slight head nod coupled with a 15-degree bow, Oh said. More formal situations like business meetings and interactions with authority figures demand a more formal bow — 45 degrees.

Meanwhile, the most formal of the bows, a full 90-degree bend, is reserved for "deep apologies," Oh said.

On the other hand, if you're greeting a close friend, there's no bow necessary — a handshake or wave will do just fine.

You should never leave your chopsticks standing vertically in a bowl of rice

A typical Korean meal is eaten with metal chopsticks and a large metal spoon.

When you're eating, it's important to remember not to leave your chopsticks standing vertically in your bowl, Oh said. That's an action associated with jesa, a Korean ceremony for honoring one's ancestors, and it would be out of place at the dinner table.

"It's symbolic of offering food to the dead," she said.

For better or worse, the grunts handle the main chunk of the fighting. These are your combat arms troops — infantry, scouts, tankers, artillerymen, etc.

The supply guys in the back can usually get a bit comfy knowing that they probably won’t get called to the front line — except in the case of total war when the front line is so decimated that everyone, back to front, needs to push into the fray.

To quantify the level of suck, we’ve ranked the following battles by a metric that measures the percentage of casualties in relation to troops present on the battlefield and total loss of life from both sides. Thankfully, for today’s troops, full-scale battles aren’t as catastrophic as they were before the advent of modern medicine.

SEE ALSO: 74 years ago, US Marines waded into 'the toughest battle in Marine Corps history' — here are 25 photos of the brutal fight for Tarawa

6. The Battle of Antietam (US Civil War) — Fatality Rate: 3.22%

Starting things off is the single bloodiest day in American military history: Sept. 17, 1862, the Battle of Antietam. Within the span of 12 hours, around 25 percent Union troops and 31 percent of Confederate troops were wounded, captured, or killed. Six generals died as a result of the battle, along with 3,454 other troops.

The battle is considered a Union victory strategically and it paved the way for the Emancipation Proclamation, delivered just five days later. But, when the dust settled outside of Sharpsburg, Maryland, no one knew who won. If the Confederacy waited a few more hours, it could have gone in their favor, Lincoln would have never had the confidence to announce the Emancipation Proclamation, and the South would have had stronger European allies, thus drastically changing the course of the war.

5. The Battle of Gettysburg (US Civil War) — Fatality Rate: 4.75%

The three-day battle between Gen. Meade’s Army of the Potomac and Gen. Lee’s Army of Northern Virginia would be remembered both as the turning point of the Civil War and for the enormous loss of life.

With between 46,000 and 51,000 casualties on both sides, the Battle of Gettysburg is the costliest battle in US history. The fighting for the “Little Round Top” alone left nearly 1,750 dead.

4. The Battle of Tuyurti (Paraguayan War) — Fatality Rate: 8.71%

The Paraguayan War became the bloodiest of all Latin American wars when Paraguay pushed its boundaries on all sides, unifying the previously-uneasy alliances between Brazil, Argentina, and Uruguay.

While the entire war would cost Paraguay nearly 70 percent of its total adult male population, the Battle of Tuyuti cost the Paraguayans nearly their entire force in a failed surprise attack on the Triple Alliance encampment.

• US consumers spend an average of $6,351 on an engagement ring.
• Aside from a diamond's size, various factors go into the pricing of an engagement ring.
• A diamond's cut, carat, color, and clarity determine its price.

Online diamond retailer Ritani knows exactly what its customers are looking for when they visit the site: an engagement ring.

"Not only is this [ring] generally [our customer's] largest purchase to date, it's typically the millennial male, and he has no idea what he's doing," Ritani's Vice President of Marketing, Mark Keeney told Business Insider during a visit to their Manhattan diamond factory.

We toured the diamond factory to find out everything you need to know when it comes to purchasing a diamond engagement ring. Below, see how much people are spending, the most popular cuts, settings, and how the "four C's" can affect price. 

SEE ALSO: What Americans spend on an engagement ring in each state, ranked from lowest to highest

US consumers spend an average of $6,351 on an engagement ring.

According to The Knot's 2017 Real Weddings Study, which surveyed 14,000 engaged or recently married individuals, consumers are spending an average of $6,351 on the ring.

And while the rule of "save up two to three month's worth of salary" is long outdated, experts are advising couples to seriously consider finances before buying a ring.

Diamonds are graded and priced based on the "four C's," which include cut, carat, color, and clarity.

The four C's are important to know because they help you understand the quality of the diamond, and they also help determine its price.

For example, a one carat round shaped diamond with an "ideal" cut grade can range from $2,521 to $12,857 at Ritani depending on its grade for clarity and color.

Cut grade determines the diamond's "sparkle" effect.

The cut grade is determined by the diamond's proportions and symmetry of each facet of the diamond — which directly effects the way the diamond captures and reflects light, creating that beloved "sparkle" effect.

Cut grade is measured on a scale from "ideal" to "poor."

Sometimes actors fall in love on movie sets. Other times, they're playing couples inspired by actual events.

Some of the best romantic comedies, tearjerkers, and Oscar-nominated pictures are based on true stories. Keep reading to see the real couples that have had their stories shared and adapted for the big screen.

Frank Pallotta contributed to a previous version of this story.

Margot Robbie and Leonardo DiCaprio played Naomi and Jordan Belfort in "The Wolf of Wall Street."

The two meet at a pool party in the Oscar-nominated movie about the stockbroker whose firm was involved with fraud on Wall Street.

In real life, Jordan Belfort met Nadine at a pool party before she became his second wife.

"The Wolf of Wall Street" did get a lot of the facts right surrounding Belfort's second marriage to Nadine Caridi, the "Naomi" character in the film.

The real Nadine was a model who starred in beer commercials, had an English aunt who smuggled money into Switzerland for Belfort, and was introduced to Belfort at a pool party.

The couple have two children together. They were divorced in 2005.

In "American Hustle," Irving Rosenfeld (Christian Bale) has to juggle conning politicians and his wife, Rosalyn (Jennifer Lawrence).

In the film, Bale and Amy Adams play con artists who get rangled into an FBI sting operation against corrupt politicians. Jennifer Lawrence plays Bale's unhinged wife.

• American tourists are bewildered by some aspects of culture in Europe.
• Dining out takes much longer and goes much later into the night.
• One visitor to Italy didn't realize how seriously locals take soccer.
• Beer can be cheaper than water in some countries.

Travelers from other countries who visit the US are mystified by many things — the ridiculously large portion sizes, squirrels, and the gap between toilet stall doors, to name a few. (You can read the full list here.)

But American tourists are just as bewildered by some aspects of life in European countries.

A Reddit thread asked Americans to share their most confounding moments while abroad in Europe. Here are 10 of our favorite answers.

Apparently, exchanging pleasantries isn't always appreciated in Germany — but asking actual questions usually is.

Reddit user efshoemaker noted that villagers of a certain age in Germany didn't have much patience for pleasantries, but did love opening up to tourists.

"[...] the older people in [the] village seemed super grumpy and mean and would never smile or respond if you said hello or good morning. BUT if you asked them a substantive question, like how to get to the museum, they would spend 15 minutes telling you the fastest way to get there, the scenic way to get there, everything interesting you should do on the way there, why that museum isn't actually that good and you should go to this other museum instead, all the different ways to get to the better museum, and where their grandmother used to live before the war."

Italy takes soccer very seriously.

While visiting Italy, groovychick found that soccer games are serious business.

"When buying a ticket, they needed to know which team I was rooting for to determine where I could sit," they wrote. "Then, during the game, people were setting things on fire." 

Everything is closed on Sundays.

norwaykiwi's most confounding Europe moment was realizing that nothing was open on a Sunday.

"When you realize that everything is closed on Sunday, because Sunday is sacred," they wrote. "Not in a religious way necessarily, but in a 'our free time is sacred [way].' Took a train through the German countryside on a Sunday and the fields were just full of people doing stereotypical free time activities: afternoon strolls, kites and model airplanes, fishing, etc."

Every zodiac sign has traits that make them endearing. But every sign also comes with their flaws.

We spoke to astrologer Linda Furiate to see what your three most annoying personality traits are based on your zodiac sign.

Of course, this is just for fun, but you can keep scrolling to see what she said.

Aquarius (January 20 - February 18): Impatient, stubborn, and emotional

Aquarius are critical thinkers with brilliant minds which can make them get frustrated and angered when others do not share or conceive their sense of logic. According to Furiate, "This can make an Aquarius lack patience with others who are perceived to be less intelligent."

Aquarius are very individualistic and can be hard to tie down so their stubborn mentality could be annoying to some as well as their tendency for explosive feelings.

Pisces (February 19 – March 20): Project guilt onto others, take on other people’s problems, impractical

Furiate told INSIDER, "Pisces are dreamers who wish to save all of humanity from the pain and experience of life first hand."

"Unfortunately, this can make a Pisces become impractical about the reality of life and may lead them to take on the suffering of others even if it leads to their own madness," she continued. "They also tend to project guilt onto others."

Aries (March 21 – April 19): Dismissive, easily angered, and rash

Furiate told INSIDER that Aries are very 'me oriented' which can make them easily angered when things don't go their way.

Aries also like to take charge, which Furiate said can ultimately make them dismissive of other people's thoughts and ideas. Their take-charge attitude can also lead to making rash or hasty decisions they may later regret.

The Annual Westminster Kennel Club Dog Show (which includes up to 2874 dogs and 200 different breeds) crowns the best in show pup every year. In 2017, a German shepherd named Rumor took home the grand prize, but all the other impressive breeds gave their best. 

Scroll down for a look at some of the other incredible dogs (and cats) featured both last year and in the current 2018 competition.

Here's Sparkle the Papillon spaniel weaving through one course with enthusiasm.

Other pups, like this golden retriever, were caught on camera with less-than-glamorous expressions.

This Cavalier King Charles spaniel seems super focused on the task at hand.