Earth is hit by 100 tons of rock from space every day. Most burn up in the atmosphere, but a single rock wiped out th...

When a massive star dies it can direct a blast of radiation that would obliterate life of earth. What are the chances...

More than 100 million pieces of small space debris are floating around the Earth. A big collision between two of thes...

Aliens could be lethal killers who want to invade and plunder our world. A team of experts investigate extra-terrestr...

Black holes were only theoretical until recently. And there are probably millions of them in the galaxy. Worse still,...

How will the universe end? Experts discuss the many possible ways that could spark the beginning of the end for the u...