What do you do with billions of dollars?

That's what Robert Frank, host of "Secret Lives of the Super Rich," tries to uncover on the CNBC show, which gives viewers VIP access into the extravagant lives of the wealthiest people on the planet.  

We sorted through clips of the show and CNBCs Instagram account, @cnbcsuperrich, and picked out the most lavish expenditures we could find. 

Here are 21 ways the super rich like to spend their money:

SEE ALSO: How celebrity coach Tony Robbins spends his millions

They can fly luxury underwater planes.

Check it out: a #PrivateJet that flies #underwater it's the #ultimate #toy for #billionaires! go down with us 10P Tues on SECRET LIVES OF THE SUPER RICH only on CNBC 6/24 #JetSet #millionaire #submarine #billionaire #yacht #toy #falcon #VIP #exclusive #billionaire #PJ

A photo posted by #SuperRich (@cnbcsuperrich) on Jun 19, 2014 at 4:19am PDT

The latest toy for the super rich is a craft that flies underwater. "The minute we went under water, everything felt natural and calm, and it was just like flying," said host Robert Frank, who got to give it a whirl.

They can drive $4 million Lamborghini Venenos.

We love this $4M grin! The 1st ever #Lamborghini #Veneno #joyride. Ride shotgun with us: only on CNBC... You can't afford to miss it! #Lambo #VIP #SuperCar #exoticcar #millionaire

A photo posted by #SuperRich (@cnbcsuperrich) on Jun 27, 2014 at 6:40pm PDT

Former tech CEO and avid car collector Antoine Dominic is one of the three lucky people in the world who owns a Lamborghini Veneno, the priciest production car on the road as of 2014. He bought this $4 million car without even seeing it ahead of time, and didn't take it out for a spin until Robert Frank and CNBC begged for a ride. You can see clips from the maiden voyage here.

They can buy megamansions for their horses.

This #mansion is worth over $20,000,000 it's fit for a king but built for a #horse - yes a horse! Get ready for SECRET LIVES OF THE SUPER RICH ... #HORSES! 10P Tues June 10th @cnbc ... You can't afford to miss this! #belmont #wellington #tripleCrown #equestrian #thoroughbred #horseshow

A photo posted by #SuperRich (@cnbcsuperrich) on Jun 7, 2014 at 8:08am PDT

The super-rich pets live the high life as well. Pictured above is a "home" in an exclusive neighborhood in Florida worth tens of millions of dollars — a home built for horses, that is.

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The massive success of last fall's "Serial" true crime podcast and this year's "WTF" podcast interview with President Barack Obama marked a cultural shift in podcasts going from a niche interest to a mainstream form of media.

According to a report this April from the Pew Research Center, one-third of Americans age 12 or older have listened to at least one podcast episode, up from just 9% in 2008.

There are tons of great podcasts on nearly any subject you can think of, but we've collected some of our favorites that are perfect for those of us always eager to learn something new, whether it's about the economy, history, or even the workings of Hollywood.

Here's some prime listening material for your next commute:

SEE ALSO: 14 books Mark Zuckerberg thinks everyone should read

'This American Life' provides a deep look into American society.

"This American Life" has become a byword for oral storytelling.

Beyond being a place for moving and hilarious stories, "This American Life" does staggering levels of reporting; few outlets made the financial crisis as human and understandable as Ira Glass and the gang.

It lives up to the hype.

Start listening here >>

'Fresh Air' will give you an intimate look at your favorite writers, celebrities, and journalists.

NPR's "Fresh Air" host Terry Gross has been on the air for more than four decades, and her interviewing skills have earned her accolades like the Peabody award, the Columbia Journalism Award, and a spot in the National Radio Hall of Fame.

Gross may have a smooth, relaxed speaking style, but the way she digs deep into her interview subjects will keep you engaged throughout the conversation, whether it's about Jake Gyllenhaal's acting process or what a writer learned from covering Mexican drug cartels.

Start listening here >>

'Freakonomics Radio' will show you surprising connections.

Journalist Stephen J. Dubner and economist Steven D. Levitt became sensations when their book "Freakonomics" was published in 2005.

In 2010, Dubner launched a podcast with the same mission as their bestselling books: ferreting out connections between seemingly unrelated things.

Unsurprisingly, the shows tend toward the intellectually provocative, with the biggest hits having titles like "Is College Really Worth It?" and "How Much Does the President of the U.S. Really Matter?"

Start listening here >>  

Business Insider recently reached out tothe most prestigious private schools in the US to obtain their summer reading lists, and we got hundreds of titles. 

The works spanned centuries, genres, and continents, to appeal to a wide array of students' personal reading tastes. 

However, of the hundreds of books we pored through, eight works kept showing up on multiple schools' lists. 

SEE ALSO: The summer reading lists at America's most prestigious private schools

"Catch-22," by Joseph Heller — 1961

Recommended at The College Preparatory School, Trinity School, and Choate Rosemary Hall

From the book cover:

Set in Italy during World War II, this is the story of the incomparable, malingering bombardier, Yossarian, a hero who is furious because thousands of people he has never met are trying to kill him. But his real problem is not the enemy — it is his own army, which keeps increasing the number of missions the men must fly to complete their service.

Yet if Yossarian makes any attempt to excuse himself from the perilous missions he’s assigned, he’ll be in violation of Catch-22, a hilariously sinister bureaucratic rule: a man is considered insane if he willingly continues to fly dangerous combat missions, but if he makes a formal request to be removed from duty, he is proven sane and therefore ineligible to be relieved.

"The Catcher in the Rye," by J. D. Salinger — 1951

Recommended at The Harker School and The Lawrenceville School

From the Barnes & Noble:

Ever since it was first published in 1951, this novel has been the coming-of-age story against which all others are judged. Read and cherished by generations, the story of Holden Caulfield is truly one of America's literary treasures.

"Cutting for Stone," Abraham Verghese — 2009

Recommended at The Lawrenceville School and Deerfield Academy

From the book cover:

Marion and Shiva Stone are twin brothers born of a secret union between a beautiful Indian nun and a brash British surgeon. Orphaned by their mother’s death and their father’s disappearance, bound together by a preternatural connection and a shared fascination with medicine, the twins come of age as Ethiopia hovers on the brink of revolution.

Moving from Addis Ababa to New York City and back again, "Cutting for Stone" is an unforgettable story of love and betrayal, medicine and ordinary miracles--and two brothers whose fates are forever intertwined.

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The Russian One is a new commuter tram that looks like something from a sci-fi film.

The futuristic tram features LED cabin lighting, felt-covered sofas, wooden handrails, and sliding glass doors that operate by touchscreen.

Luckily, photographer Ilya Varlamov was able to snap some pictures of the new Russian One prototype, right from the showroom floor.

Note: All photos shown are used with permission.

The Russia One is covered in stunning glass paneling.

This is the tram's designer, Alexei Maslov.

The interior of the tram is incredibly beautiful.

Let's get this out of the way right now: Nobody performs well under pressure. A lot of us think we do, but we don't, or, at least, we don't perform as well as we could perform.

We may feel more creative when we're under the gun, but it's a feeling, not a reality. It's true that you might be more productive, but the products you create are usually worse.

In their new book, "Performing Under Pressure: The Science of Doing Your Best When It Matters Most," Hendrie Weisinger and J.P. Pawliw-Fry deliver the sad truth: The difference between regular people and ultra-successful people is not that the latter group thrives under pressure. It's that they're better able to mitigate its negative effects.

Or maybe that's good news, because, as they lay out in the book, handling pressure is a skill, and you can learn it. In the book, they offer 22 tactics for doing your best when the heat is on. We took a deep breath and picked out 13 of our favorites.

SEE ALSO: 15 surprising negotiating tricks to boost your salary

Think of high-pressure moments as a (fun) challenge, not a life-or-death threat.

Most people see "pressure situations" as threatening, and that makes them perform even less well. "Seeing pressure as a threat undermines your self-confidence; elicits fear of failure; impairs your short-term memory, attention, and judgment; and spurs impulsive behavior," Weisinger and Pawliw-Fry write. "It also saps your energy."

In short, interpreting pressure as threat is generally very bad. Instead, try shifting your thoughts: Instead of seeing a danger situation, see a challenge. 

"When you see the pressure as a challenge, you are stimulated to give the attention and energy needed to make your best effort," they write. To practice, build "challenge thinking" into your daily life: It's not just a project; it's an opportunity to see if you can make it your best project ever. 

Remind yourself that this is just one of many opportunities.

Is this high-pressure situation a good opportunity? Sure. Is it the only opportunity you will ever have for the rest of your life? Probably not. 

"The fact is, it is realistic to think that additional opportunities will come your way," Weisinger and Pawliw-Fry write, who encourage you to consider how many people needed multiple chances to ultimately succeed. (We have a few examples here.) 

Before an interview or a big meeting, give yourself a pep talk, they advise: "I will have other interviews" (or presentations or sales calls). 

Focus on the task, not the outcome.

This might be the easiest tactic of all, according to Weisinger and Pawliw-Fry: Instead of worrying about the outcome, worry about the task at hand.

That means developing tunnel vision, they explain. When you keep your eye on the task at hand (and only the task at hand), all you can see is the concrete steps necessary to excel.

For a student writing a paper, that means concentrating on doing stellar research — not obsessing about the ultimate grade, what will happen if you don't get it, and whether you should have majored in economics after all.

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Carlos Slim Helu, Mexico's wealthiest man and one of the richest self-made billionaires in the world, flies under the radar more than you might expect, considering he owns more than 200 companies in Mexico, which is also known as "Slimlandia." 

With a net worth of at least $35.4 billion, Slim's influence is far-reaching in Mexico and abroad.

So what drives the man who built a giant business empire across one of the poorest countries in the Americas? Read on to find out.

SEE ALSO: The 25 richest self-made billionaires in the world

SEE ALSO: Meet Len Blavatnik, the richest man in Britain

FOLLOW US: Business Insider is on Facebook

Slim's parents were Lebanese immigrants who moved to Mexico before his birth. They endowed their son with strong values, and his father taught him to read financial documents and invest at a young age. Slim has carefully preserved his childhood home and keeps a photograph of his father on his desk.

Source: Wealth-X, Telegraph UK

After moving to Mexico, Slim's father was successful in both retail and real estate; upon his death in 1953, his son, Carlos, inherited his businesses.

Source: Wealth-X

Slim also holds a deep love for his country. He said, “Mexico is so rich in culture and history, and I have always enjoyed that.”

Source: Telegraph UK

Facebook makes nearly all of its money from ads. It's also begun investing in moonshot projects from virtual reality headsets to drones and laser communication systems.

One area it doesn't talk about: the $3.5 trillion enterprise tech market. That's how much money businesses spend on tech every year to run their companies and help employees do their jobs. 

Although Facebook did recently introduce an experiemental Facebook At Work service which lets teams use Facebook to communicate and share stuff, it's not much of a focus for the company.

All of which might make it seem as if Facebook has been completely absent from that that $3.5 trillion market.

But it hasn't. 

Facebook has actually helped cook up a whole bunch of startups that want to change the way enterprises use tech.

They were inspired by how Facebook uses technology to run its massive social network, often giving away the technology it invents for free, everything from data center hardware designs to databases.

Here's a look at some of the unusual enterprise startups from Facebook.

SEE ALSO: This 13-year-old programmer wowed 4,000 people with an inspiring keynote speech

Coolan

FB Alum: Amir Michael, Jonathan Heiliger

Funding: Seed Round

Michael was previously hardware design manager and Heiliger as VP of infrastructure at FB, and they both played key roles in launching the company’s Open Compute Project.

They’re veterans of disrupting the data center, and together with Amir’s brother Yoni, they founded Coolan, a crowdsourced, analytics platform that provides insights on server performance.

Interana

Facebook alums: Bobby Johnson, Lior Abraham

Funding: $28.2 million, total

Johnson was a director of engineering at FB for six years, responsible for scaling the site from millions to billions of users.

Abraham invented a specialized database called SCUBA while at Facebook. It's a visual analytics tool adopted by over half of the company’s employees that lets Facebook see how Facebook's technology is performing in real time.

Together with Johnson's wife Ann, they founded Interana, a self-service data analytics tool. Customers include Sony, Tinder, and Jive.

SignalFX

Facebook alum: Philip Liu

Funding: $28.5 million, total

Liu was a software architect at Facebook where he developed software that helped Facebook setup and monitor IT systems.

He went on to co-found SignalFX that detects patterns about the health of the IT infrastructure. Yelp and Tapjoy are customers.

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Before the modern jumbo jet and its first class suites, the biggest and grandest thing in luxury air travel was the German Zeppelin Airship.

Of all the massive Zeppelin's constructed, the most famous was the Hindenburg, which crashed in New Jersey in 1937. The Hindenburg was designed to ferry passengers across the Atlantic in serenity, with the dirigible floating smoothly through the clouds.  

The Hindenburg was the first of two "Hindenburg" Class airships constructed by the Zeppelin Company. Construction of the airship began in 1931 and was completed in 1936. The Hindenburg, along with its highly successful predecessor, the Graf Zeppelin, made numerous trans-Atlantic crossings in their brief but illustrious careers.

Constructed out of an aluminum alloy called duralumin, the Hindenburg's massive frame work was filled with 7 tons of hydrogen. Hydrogen is much lighter than air, and allows the massive Zeppelin to carry more people in greater levels of luxury. However, with an ignition source, an oxidizer, and right concentration, hydrogen can also be incredibly flammable. This is the theory of what happened in 1937 when the Hindenburg went down.

The Hindenburg entered passenger service in May of 1936 and carried up 50 passengers in luxury across the Atlantic.

The legend of the Hindenburg's luxurious amenities are well known, but most have not seen them in living color. So take the opportunity to check out these wonderful photos of the Zeppelin's passengers spaces courtesy of airships.net and the German Federal Archive. 

Prior to the age of the airliner, Zeppelin airships ruled the skies over the north Atlantic — connecting cities like New York with Western Europe. Zeppelin's fleet of airships included such colossal creations like the Graf Zeppelin and the Hindenburg (seen here) along with the less famous Graf Zeppelin II.

In fact, here's a photo of Business Insider's world headquarters taken from the Graf Zeppelin in 1929.

The most well known of the Zeppelin airships was named after former German President Field Marshal Paul von Hindenburg.

A recent feature in The New York Times highlights what it describes as the "Dorms You'll Never See on the Campus Tour."

These residence halls stand in stark contrast to many of the opulent living situations colleges now use to lure students on campus.

"Built in the middle of the last century or even earlier, they have survived to shock and dismay new freshmen with their cinder block aesthetic and dingy common rooms," Times reporter Vivian Yee writes. "Air-conditioning is a distant luxury. Bathrooms are nasty, crowded and few."

The Times article shines a light on some of the most "loathed" dorms around the country. Here's what it's like to live in a few of the worst:

SEE ALSO: 22 college majors with the highest starting salaries

Quadrangle Hall, at the University of Iowa, is slated for demolition in 2017.

Designed to be a World War I barracks, Quadrangle Hall is almost 100 years old. Here it is in 1923:

The age shows. "It kind of always smells like it's 100 years old ... It's kind of like a mixture of mildew and old people, I would say," one resident told The Times.

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One month after a Bosnian-Serb assassinated Austrian Archduke Franz Ferdinand and his wife, Sophie, Duchess of Hohenberg, on a street corner in Sarajevo, Austria-Hungary declared war on Serbia, effectively beginning World War I.

Ferdinand's murder sent the Great Powers into a war that would last five years and cost the lives of 10 million troops.

Thought of as the "war to end all wars," World War I marked a number of firsts in military conflict, including the use of planes, tanks, and chemical weapons. 

On June 28, 1919, the victorious Allied leaders signed the Treaty of Versailles, officially ending World War I and spurring German nationalism, which in turn gave Nazi leader Adolf Hitler a political platform.

Here's a few colorized photographs published by The Open University showing life during World War I.

SEE ALSO: Haunting visions of World War I live on in these overlay photos

Trench warfare was one of the hallmarks of World War I.

Soldiers could spend the majority of their deployments in the trenches. Here, a soldier receives a haircut from a barber on the Albanian front.

Here, a German Field Artillery crew poses with its gun at the start of the war in 1914.

Any good parent wants their kids to stay out of trouble, do well in school, and go on to do awesome things as adults. 

And while there isn't a set recipe for raising successful children, psychology research has pointed to a handful of factors that predict success.

Unsurprisingly, much of it comes down to the parents.

Here's what parents of successful kids have in common:

SEE ALSO: The best music to listen to for optimal productivity, according to science

1. They teach their kids social skills.

Researchers from Pennsylvania State University and Duke University tracked more than 700 children from across the US between kindergarten and age 25 and found a significant correlation between their social skills as kindergartners and their success as adults two decades later.

The 20-year study showed that socially competent children who could cooperate with their peers without prompting, be helpful to others, understand their feelings, and resolve problems on their own, were far more likely to earn a college degree and have a full-time job by age 25 than those with limited social skills.

Those with limited social skills also had a higher chance of getting arrested, binge drinking, and applying for public housing.

"This study shows that helping children develop social and emotional skills is one of the most important things we can do to prepare them for a healthy future," said Kristin Schubert, program director at the Robert Wood Johnson Foundation, which funded the research, in a release.

"From an early age, these skills can determine whether a child goes to college or prison, and whether they end up employed or addicted."

2. They have high expectations.

Using data from a national survey of 6,600 children born in 2001, University of California at Los Angeles professor Neal Halfon and his colleagues discovered that the expectations parents hold for their kids have a huge effect on attainment. 

"Parents who saw college in their child's future seemed to manage their child toward that goal irrespective of their income and other assets,"he said in a statement.

The finding came out in standardized tests: 57% of the kids who did the worst were expected to attend college by their parents, while 96% of the kids who did the best were expected to go to college.

This falls in line with another psych finding: the Pygmalion effect, which states "that what one person expects of another can come to serve as a self-fulfilling prophecy." 

In the case of kids, they live up to their parents' expectations.

3. The moms work.

According to research out of Harvard Business School, there are significant benefits for children growing up with mothers who work outside the home.

The study found daughters of working mothers went to school longer, were more likely to have a job in a supervisory role, and earned more money — 23% more compared to their peers who were raised by stay-at-home mothers.

The sons of working mothers also tended to pitch in more on household chores and childcare, the study found — they spent seven-and-a-half more hours a week on childcare and 25 more minutes on housework.

"Role modeling is a way of signaling what's appropriate in terms of how you behave, what you do, the activities you engage in, and what you believe," the study's lead author, Harvard Business School professor Kathleen L. McGinn, told Business Insider.

"There are very few things, that we know of, that have such a clear effect on gender inequality as being raised by a working mother,"she told Working Knowledge.

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Days after the head of the International Olympic Committee identified Rio de Janeiro's polluted waterways as the No. 1 challenge facing the 2016 Olympics, an Associated Press investigation revealed just how dangerously filthy these waters really are.

The AP tested the water and found that Guanabara Bay, Copacabana beach, and Rodrigo de Freitas Lake — all of which will host watersports events next summer — aren't safe for swimming or boating, and contain concentrations of viruses that are "roughly equivalent to raw sewage."

"As a result, Olympic athletes are almost certain to come into contact with disease-causing viruses that in some tests measured up to 1.7 million times the level of what would be considered hazardous on a Southern California beach,"the AP reports.

The pollution is the result of untreated human waste pouring into the waterways. It has been a public health issue in Rio for decades, but with the world's biggest sporting event 12 months away, Rio's waters are literally being put under the microscope.

Looking at recent photos from these polluted venues, it's alarming that they'll be hosting the Olympics in 12 months.

Guanabara Bay will host the sailing events.

It looks idyllic from above.

But the waterway was one of the locations where the AP found dangerous levels of virus concentration.

Source: AP

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China's construction boom has been one of the biggest drivers of economic growth in the past few years.

And although most of that has been original infrastructure, China also focused its attention on building replicas of world-famous tourist destinations.

Many of the original "world wonders" are considered cultural status symbols that reflected an empire's soft power. Consequently, some analysts believe that it's about more than just pretty tourist spots for China.

"The ancient parallels for these copycat projects suggest that they are not mere follies, but monumental assertions of China’s global primacy," Oxford University scholar and archaeologist Jack Carlson wrote a few years back.

A nearly full-scale copy of the Great Sphinx of Giza, which was built by the ancient Egyptians of the Old Kingdom circa 2500 BC, is now standing at an unfinished theme park in Chuzhou, Anhui province in China.

Source: Sacred Destinations

In the Beijing World Park, there are replicas of the Washington DC's White House and Lincoln Memorial, as well as New York's Statue of Liberty.

Source: China Guide

Other fun things you can find in the Beijing World Park include the Sydney Opera House and the Sydney Harbour Bridge. In total, there are over 100 world famous attractions in the park.

Australian investment bank Macquarie's "Macro Monday" note on China presents a worrying snapshot of the country's economy.

Headlines have been dominated by the country's recent stock market collapse, which so far hasn't spilled over to the wider economy.

But, as Macquarie points out, that's just one of several big issues facing China right now.

Below are 4 of the scariest charts.

1. Chinese stocks slumped 10% last week

Despite huge levels of intervention from Beijing, stock markets are still diving. Last week alone the benchmark Shanghai Composite fell 10%. Between its peak in June and its low in July the index collapsed over 30%.

Clearly there's still a huge issue with stock markets right now and that's a big problem for the government. Millions of ordinary Chinese investors have money tied up in shares and there are fears that if the slump gets any worse it could threaten "social stability."

2. Exports are dead and investment and consumption are dying

The chart above shows the makeup of China's GDP growth and pretty much everything is falling. Exports, which played a big part in GDP between 2005 and 2007, died in 2009 and don't look like coming back. Meanwhile investment and consumption — ordinary Chinese spending money on things — are both also shrinking.

3. ...and GDP growth is slowing

Given that all the components of GDP are contracting, it's no surprise that GDP growth is falling and predicted to keep shrinking. Economists also expect China to miss its projected growth targets and sceptics also believe China's growth figures are inflated.

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The US has an enormous economy, and that economy is the sum of the economies of 50 states and the District of Columbia.

We noted previously that those state economies are big enough and complex enough to compare with those of entire countries, and so we are once again taking a closer look at what makes those economies work.

We ranked the economies of these states, and DC's, on seven measures: unemployment rates, gross domestic product per capita, average weekly wages, and recent growth rates for nonfarm payroll jobs, GDP, house prices, and wages.

While we didn't factor them into the ranking, we also looked at the Fortune 1000 companies that have their headquarters in each state and which industries were disproportionately important in each state. This helped us get a little more insight into what makes each state economy tick.

For more details on methodology and sources, click here.

SEE ALSO: 16 charts that illustrate America's global dominance

51. Mississippi

Mississippi came in last in our ranking of state economies. Chicken, soybean, cotton, and rice farming are among the state's most disproportionately large employers.

Mississippi had the lowest 2014 GDP per capita of any of the states, at just $35,019, and the lowest Q4 2014 weekly wage, at $747. The rate at which both of those measures was changing were also weak: Mississippi had the second-lowest GDP growth rate, with state GDP shrinking by 1.2%. The average weekly wage grew just 2.3% between Q4 2013 and Q4 2014.

50. West Virginia

West Virginia's economy revolves around the coal industry, with underground and surface coal mining coming in as the most disproportionately important industries in the state.

West Virginia was one of just two states in which fewer people were working in June 2015 than in June 2015, with a drop of 1.2% in nonfarm payrolls over the year. The Appalachian state was also one of only three states where housing prices dropped between Q1 2014 and Q1 2015, and had the biggest drop in the state housing price index, falling 3.90%. One bright spot was that GDP grew by 5.1% in 2014, higher than the national rate of 2.2%.

49. Alabama

Alabama has several manufacturing industries, including textile mills, logging operations, and poultry hatcheries.

Alabama's 2014 per capita GDP of $41,127 was far lower than the US per capita GDP of $54,307. GDP growth was also slower than in other states, increasing just 0.7% in 2014. Alabama's housing market remains lackluster, with housing prices rising just 1.8% between Q1 2014 and Q1 2015.

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Sean Parker found immense success at an incredibly young age. 

At the age of 19, he cofounded Napster, a file-sharing service that would change how the world consumes music. 

By 24, he was the founding president of Facebook, a startup that was then tiny but would go on to become the biggest social network in the world. 

The 35-year-old, whose net worth is now estimated to be about $3 billion, hasn't slowed down a bit. He recently launched Brigade, a social platform meant to encourage civic engagement, and donated $600 million toward his own foundation. 

He's found a bit of controversy along the way, developing a reputation for being a big partier and an even bigger spender. 

Parker cofounded file-sharing service Napster in 1999, when he was only 19 years old. Napster became one of the fastest growing businesses of all time, as well as one of the most controversial. Parker and his cofounder, Shawn Fanning, are often credited with revolutionizing the music industry.

Source: Fortune

After several law suits from music associations eventually shut down Napster, Parker went on to found a social networking site called Plaxo. He was ousted two years later.

Read more about Plaxo »

Parker joined the Facebook team in 2004, when it was just a fledgling college startup. As the social network's founding president, he would play a huge role in the site's early investments, design, and transition into a viable company.

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If you want to be an executive, billionaire, or US president, it's a good idea to go to Harvard Business School.

Harvard offered the world's first master's in business administration program, and the Harvard MBA has since been a hallmark of the elite, with George W. Bush, Mitt Romney, and Michael Bloomberg all earning the degree.

We sifted through HBS's sterling history to find the most powerful, prominent, and financially successful grads that came out of Cambridge.

An earlier version of this article was written by Richard Feloni and Drake Baer.

NOW READ: The 25 most successful Stanford Business School graduates

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Sheryl Sandberg is largely credited with making Facebook profitable. The 1995 HBS alum initiated a global conversation about women and work with her bestselling book "Lean In."

Source: Forbes

Stephen R. Covey, class of 1957, became tremendously influential after publishing his bestselling book "The Seven Habits of Highly Effective People."

Source:Amazon

After earning his MBA in 1942, Philip Caldwell took over as the first non-Ford to run Ford Motor Company, where he led one of the biggest turnarounds in American business history.

Source: Bloomberg

Flight attendants are humans too, and just like everyone else, they need to sleep on long-haul flights.

But where do they do it?

Most Boeing 777 and 787 airliners have a secret stairway that leads to a tiny set of windowless bedrooms for the cabin crew — and few people know they even exist.

See what the secret cabins look like.

An earlier version of this story was written by Jim Edwards.

SEE ALSO: The 20 best airlines in the world

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It depends on the plane, but usually crew rest areas are hidden behind the cockpit, above first class, like on this Boeing 777.

Secret stairs lead up to the bedrooms where the cabin crew sleeps.

The steps are hidden behind an inconspicuous door that's usually near the cockpit. Usually, a code or key is needed to open it.

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The League, a selective dating app for successful people, launched in San Francisco earlier this year, and a few months ago it launched in New York City.

Stanford graduate Amanda Bradford founded The League and raised $2.1 million to match up highly motivated and interesting single professionals.

On July 31, The League held a party out in Montauk, exclusively for its selective group of New York users. Mischa Barton and Karlie Kloss were among the attendees.

We tagged along to check out The League and its pool of elite users to see what all the fuss was about.

SEE ALSO: Highly selective dating app The League launches in New York, and only 2,500 people are allowed to use it

This is Amanda Bradford. She's the founder of The League.

If you want to join The League, Bradford says, the most important trait you need is ambition.

You'll likely meet up with other ambitious people, too.

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