Billions of years ago, another planet smashed into Earth. An event of this epicness could have created our Moon. It also ...

Scientists are listening in on sperm whale conversations and studying Earth's strangest microbes to prepare humanity for first contact with extraterrestrial life.

A newly developed computer model reveals that rocky planets must have a radius at least 80 per cent of Earth to maintain a ...

To travel between solar systems, a spacecraft would need extremely sophisticated – if not impossible – technology.