So you’re a serious runner? Consider the Self-Transcendence Race, running around the same half-mile loop for 3,100 miles.
Tommy Caldwell talks about his lifelong obsession with climbing.
He may have already conquered El Capitan, but Alex Honnold can dream up far more daring and dangerous adventures.
Do chimpanzees have spiritual experiences? A remarkable discovery in West Africa suggests they might.More
Do scientists see the world in a different way? Not really. Just be curious.More
Biologist Carin Bondar has devoted her career to exploring the myriad ways animals mate in the wild, and shared a few of the ingenious ways animals find each other, breed, and rear offspring.