It's perhaps the biggest, most controversial mystery in the cosmos. Did our Universe just come into being by random c...

They are the most powerful objects in the universe. Nothing, not even light, can escape the gravitational pull of a b...

Einstein's Theory of Relativity says that time travel is perfectly possible — if you're going forward. Finding a way ...

Every cosmologist and astronomer agrees: our Universe is 13.7 billion years old. Using cutting-edge technology, scien...

Everywhere we look, life exists in both the most hospitable of environments and in the most extreme. Yet we have only...

Aliens almost certainly do exist. So why haven't we yet met E.T.? It turns out we're only just developing instruments...

Our understanding of the universe and the nature of reality itself has drastically changed over the last 100 years, a...

What is the universe made of? If you answered stars, planets, gas and dust, you'd be dead wrong. Thirty years ago, sc...