The universe is vast and teeming with stars – but if intelligent life exists, it may not be able to visit Earth.

A mysterious visitor from the depths of interstellar space has just challenged our understanding of the cosmos. It's not merely a frozen chunk of ice drifting through the void but potentially a vessel ...

The U.S. Department of War's first data dump of UFO documents might not convince many people, but it does make for an entertaining read.