By snatching chloroplasts from algae, animals called sacoglossans produce their own energy through photosynthesis ...

Viewing volcanoes, snorkeling with manta rays, taking ghost tours and more are Hawaii experiences best enjoyed after dark.

The images that recently have gone viral actually date back to 2001.

Do little green men exist? Was 'Men In Black' a documentary? Prediction markets are pricing the probability of a U.S. government confirmation of alien life before the year 2027. Find out why traders ...

The current administration is appealing after an appeals court ruled against it, finding that asylum-seekers “arrive in the United States” when they present themselves to immi ...

A ring camera from a Southern California home captured an alien-like figure walking across a yard. NBC News' Camila Bernal spoke to some experts on whether they feel ...