Daily Archive: October 23, 2016

Why do your knuckles pop?

Some people love the feeling of cracking their knuckles, while others cringe at the sound. But what causes that trademark pop? And is it dangerous? [Via: ed.ted.com/Eleanor Nelsen]

Doomsday seed vault

Way up north, in Svalbard’s permafrost, 1300 kilometers beyond the Arctic Circle, is the world’s largest secure seed storage, opened by the Norwegian Government in February 2008. From all across the globe, crates of...