This over-50 extreme sports athlete makes peoples' jaws drop with only one wheel. Terry Peterson, best known as the UniGeezer, has become a worldwide sensation on a unicycle.

For a man who has run over 100 marathons at least 100 miles long each and climbed to the top of all the seven summits of the world, it's hard to believe Marshall Ulrich was a bit of a coach potatoes until he was almost 30.

Well, maybe THIS guy does. Growing Bolder introduces you to Rhett Rotten, a young man dedicated to keeping the tradition of the Wall of Death alive.

This barefoot-water-skiing, Guinness-Record-holding and drumming nanogenarian is an international sensation who's unlike anyone you've ever met.

World-famous barefoot water-skier "Banana George" Blair isn't letting a little thing like turning 92 keep him off the water.

Surf's up for men and women of all ages! The world's biggest Surf Expo is for buyers and sellers only, so we took our cameras inside to give you a tour. We found a booming industry that is Growing Bolder every year.

Bernadette Pace is a 65-year-old who likes to fly high – literally. She's a trapeze extraordinaire who has taken her talents to higher levels. She's even built a flying trapeze rig in her own backyard!

Angie Washo is the first woman and only amputee ever to compete in the AlCan Road Rally. Remarkable that two years before, her leg was severed when a hit and run driver hit her motorcycle.

It's the ultimate motorized highwire act, requiring lightning-fast reflexes, incredible strength and stamina, and nerves of steel. For decades, motocross has been a young man's extreme sport. It's still extreme, but suddenly there's gray hair everywhere.