Ray Zahab is back on the adventure scene. After completing his record run across Lake Baikal with Kevin Vallely to draw attention to the global clean-drinking-water crisis, Zahab will return to Tunisia. The first time around, he starred in the documentary Running the Sahara, narrated and executive-produced by Matt Damon.

British adventurer Dave Cornthwaite spent almost three months stand-up paddleboarding the length of the Mississippi River. We break his trip down by the numbers.

Physicist Dan Kammen

This season, among other dubious firsts, Mount Everest will see a summit bid by the youngest climber, 13-year-old Jordan Romero, and the first attempt by a climber with an artificial hip, 65-year-old Don Healy. One bright spot: Draper, Utah–based Apa Sherpa, who first summited the peak in 1990 with Rob…

Who's that woman screaming about global warming? It's Laurie David�wife of Seinfeld creator Larry David�and she's convinced that what the earth needs now is... Hollywood, baby!

Not her first bee blouse

Outside reviews the best gear in the 2011 Summer Buyers Guide, including the Smith Scientist sunglasses.

Our man tries to transform his body by confusing his muscles.

A tent that's light, hurricane-proof, and breathes like it's made of mesh.

This travel-ready routine should take around 25 minutes. Power through these six exercises ten times with no rest between moves.