Writer and adventurer Jeff Wise explains the biology of an adrenaline rush, an ancient evolutionary response that gives us temporarily "superhuman" control over our bodies and brains.
When Bear Grylls flew his paraglider over the summit of Mt. Everest, enduring temperatures 100 degree below zero and winds the speed of a Category Five hurricane, what was going through his mind?
His breathing labored, his heart pounding, Kevin Jorgeson summoned the courage to ascend thirty glasslike pitches on one of the world's deadliest climbs: a 3,000 foot granite monolith known as El Capitan.
Orangutans are clever - using their hands and leaves they can make intimidating kissing sounds causing listeners to think they're bigger than they actually are.
Imagine if you could erase your memory with the help of a pill. Dutch scientists believe they have found a way to erase phobias or painful memories with the use of a drug.