"An epic exploration of possibilities. What If is a Webby Award-winning science web series that takes you on a journey through hypothetical worlds and possibilities, some in distant corners of the ...

The universe is a crazy place. In fact, it's probably the craziest place you've ever been. It's full of exploding stars and immortal jellyfish and it's been kicking around for almost 14 billion years.

Many of the atoms you're made of, from the calcium in your bones to the iron in your blood, were brewed up in the heart of an exploding star billions of years ago.

The Boomerang Nebula holds the record for the coldest known natural place, with a temperature of just -458 degrees Fahrenheit (-272 degrees Celsius), only one degree above absolute zero. Venus takes ...