Aliens exist - they just haven't visited Earth, NASA veteran Dr Gentry Lee has claimed.

For years, public anxiety has often been accompanied by people claiming they saw it all coming. Pandemics, royal deaths, ...

Why it matters: While not evidence of life, these discoveries show that ancient Mars had complex organic chemistry, ...

The lunar rocks collected by Apollo astronauts suggested the moon had a strong magnetic field. A new analysis shows the ...

Something wasn’t making sense—and then scientists realized they were looking in the wrong place.