This time-lapse captures the stunning, slow-motion transformation of a Zygo cactus, also known as a Christmas cactus. We started rooting a tiny cutting with water. It was then transplanted into soil ...

About 20 years ago, a neuroscientist named David Eagleman strapped a bunch of students into harnesses, hoisted them to the top of an imposing metal tower, and then, without warning, dropped them 150 ...