We think our feet are always on solid ground, but in Florida it's more like Swiss cheese. Dick speaks to Casey McKinlay, who, along with his diving partner Jarrod Jablonski, pulled off a 21-hour dive through underwater caves that connect sinkholes.
Luke Tipple, a marine biologist, grew up swimming and diving off the coast of southern Australia. He knows how to get the upper hand with a shark in the water, and has been hired by long distance swimmer Diana Nyad to protect her on a swim from Cuba to Florida.
Climb up 130 feet into the crown of a rainforest tree in New Guinea and wait. And wait. Wildlife photographer Tim Laman tells Dick about his journey to photograph every species of the Birds of Paradise. It took him 8 years and 18 expeditions to do it, and there are still a few he was not able to capture. The feathers and colors are hard to believe.