So the mathematician's answer is that humans have either seven or eight holes. In the end, the question is not just about ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Each human is a ...

On March 2, 2016, at around 9 A.M. local time, in Kazakhstan, Scott Kelly plunged through the Earth’s atmosphere in a Soyuz spacecraft travelling at seventeen thousand miles an hour. As expected, ...