Extraterrestrial civilisations could give themselves away by the night-time glow of their cities. And if there is one lurking in the outer reaches of our solar system, we are ready to find it.

Researchers want to explore the idea that microscopic particles shed by alien civilizations have accumulated on the lunar ...

In an impressive illustration of the enormity of space, NASA recently discovered a space rock roughly the size of Manhattan, just a few months before it was set to fly near Mars. Up to that point, the ...