A large comet that scientists think may have come from another solar system is currently streaking towards our sun. The 'alien' space rock, which at 3.7 miles (six kilometres) wide is the size of ...

Forget the sci-fi image of aliens as delicate, waif-like creatures - they’re probably absolutely massive, a scientist says. Fergus Simpson of the University of Barcelona says that - according to ...

When it comes to extra-terrestrials, you'd be forgiven for picturing them as little green men. But Britain's top biologist has claimed they could be much bigger, and far more terrifying than the man ...

There are millions of planets out there that could contain intelligent life. We can't look at them all, so which should we focus on? Using nothing but statistics, astronomer Fergus Simpson predicts ...

ALIENS are likely to have a brain the size of a planet compared with us, a leading UFO-hunter says. The first aliens will have been around billions of years longer than humans, according to Dr Andrew ...

We haven't found any aliens yet, but just using statistical techniques, we can make some pretty good guesses about what they'll be like if we do. The answers may surprise you. Show more There are ...