What makes you happy? It can be a tricky question to answer. In fact, global researchers from Yale to UC Berkeley are now studying happiness and how important it is to our sense of well-being.

What was it like raising your son? It's the number one question Dierdre Wolownick gets when people find out she's the mother of Alex Honnold, the first person to Climb Yosemite's El Capitan with no ropes, no safety net and nothing else to save him.

The word "can't" doesn't really register with Eric Tozer. The type 1 diabetic just made history completing the World Marathon Challenge. That's seven marathons in seven days on seven continents. No one with type 1 diabetes had done that before.

Heads up: it takes pop icon Debbie Gibson all of 20 seconds to bust into " Only in My Dreams" on this episode. In the late 80s, there was no one bigger in pop music than Debbie Gibson. At 17, she set the record for being the youngest female artist to write, produce and perform a number one song. This summer, she's celebrating the 30th anniversary of her album " Electric Youth" by joining other 80s acts like Salt-N-Pepa, Naughty By Nature and Tiffany on the NKOTB Mixtape Tour. Why is there still such huge demand for 80s pop music? Debbie credits nostalgia and a website called Cameo where stars like Debbie create personalized shout-outs for their fans.

The next Gold Rush is more like a Green Rush and our guest, Kerrigan Behrens, is one of its pioneers.

Feel free to underestimate Marcie Frost. It's when she's likely to do her best work. Frost is the CEO of CalPERS, the California Public Employees Retirement System. Google her and the first thing you'll see after her CEO title is a line that usually points out the fact that she doesn't have a college degree and she was a teen mom. What she has instead is an incomparable work ethic honed in the same Washington town where the "Twilight" series is based. As Frost says, "just because I wasn't formally educated doesn't mean I wasn't educated."

You know it's a bad day at the Daytona 500 when your spotter is heard on the radio saying 'Oh God, no Jesus!' But that's where NASCAR driver Matt DiBenedetto found himself after getting into a 21-car crash in a race he'd led until the last 10 laps. Matt is a first generation racer who defies odds in a sport where most drivers grow up in the racing culture. Matt didn't and being the perpetual underdog fuels his raw passion.

Brad Bonar is a nationally known stand-up comic. He's used to packing clubs and filling auditoriums at corporate comedy gigs. But, his latest show is about a subject that isn't usually a laughing matter. It's a show about depression and suicide and it's hilarious. Really. It's also making a powerful impact in a community where three out of four performers admit to struggling with mental health issues.

Tim Collom is a born salesman. There's nothing he can't create, market and turn into a business.

"What's your excuse?" Maria Kang could never have guessed what would happen when she posted that caption on Facebook six years ago.