The results of a coin toss are random--or so we thought. But a provocative new video from YouTube's Numberphile series turns that conventional wisdom on its head.
The video maintains that the ratio of getting heads vs. getting tails isn't 50/50. It's more like 51/49--with the coin more likely to come up the same way it started. So you're more likely to get heads if the toss starts out with heads face-up, and tails if the toss starts with tails facing up.