Could humans spread Earth life beyond our planet? Astrobiologists explain where extremophiles might survive and why the risks ...

Once, a man called the authorities about an "enormous light" that was "blazing" above his house—only to call back shortly to explain it was actually the Moon.

From the Greys to the Nordics, these aliens appear frequently across abduction stories and science fiction tales.

Some creative calculations using bug traps, epidemiology and trees suggest there are some 20 million unique insect species on ...

The “Wow!” signal is one of our best pieces of evidence for aliens, but researchers are building a compelling case for a more ...