National Geographic Weekend

This week, we run the world biggest rapids, scuba in the world's coldest (liquid) water, and walk from Africa to South America.

This week, we find our oldest ancestors deep inside of a South African cave, then we go to Antarctica with our children, and finally, we watch galaxies collide deep in space.

This week, we get held up at gun point while kayaking the Amazon, then fly over Jerusalem, and finally we trap tigers (with our cameras).

This week, we climb Antarctic peaks never before summitted, then we join a circus in Mexico, and finally we crush elephant ivory.

This week, we ride 6,000 miles by horse across Asia to Europe, then we meet some killer wasps, and finally, we learn about the world's best scuba diving spots.

This week, we successfully summit Everest seven times, then we track fighting elephants in the bush, and finally, we spend 18 months paddling through Canada's north.

This week, we ride horses from Calgary to Brazil relying on the kindness of strangers, then we forego motorized vehicles for 22 years while maintaining a vow of silence, and finally, we get some hiking tips from the best hiker in the world.

This week, we attempt the never-before completed Cuba to Florida swim in the open ocean, then learn what happens when worlds collide and the planetary order of our solar system gets rearranged, and finally, we meet Australia's "Black Elvis," the Aboiginial king of country music.

This week, we set a world hang gliding record high above Texas, then we learn to love the outdoors through jalapeno peppers, and finally, we catch the giant squid on camera at depth for the first time ever.

This week, we survive a 1,000 foot fall from an Andes cliff, then we rove across Mars with Curiosity, and finally, we sleep 1,200 feet above Yosemite National Park.

This week, we cross Botswana's Okavango Delta on foot - keeping an eye out for hippos and crocs - then, we set a speed record climbing up and skiing down Mt. Rainier, and finally, we learn about crossing the Sonoran Desert to avoid detection by American customs officials.

This week, we negotiate a peace between African rebels and elephants, then we trek 1,000 miles through Mexican desert and wind up with blisters on top of our feet, and finally, we boulder in Macedonia's remote backcountry.

Last week was National Geographic's annual "Explorer's Symposium," where we celebrate our new class of Emerging Explorers. On this week's podcast, we revisit some of our favorite explorer moments from our past and chat about deep-sea cave diving, bringing back an extinct bird, and finding inspiration by reassembling bones of meals past.

This week, we meet some of National Geographic's favorite explorers in celebration of our 125th Anniversary: climbing Everest with the first American at the summit, head to Mars with Buzz Aldrin and speak with storm chaser Tim Samaras for his last interview with National Geographic.

This week, we climb Everest when it's been slammed with snow and ski down, then we strap four jet engines on our back to try to fly, and finally, we chase ice and almost win an Oscar for our efforts.