To survive the deep ocean, sea creatures have all kinds of adaptations that give them alien-like appearances, such as huge ...

Letters: Readers offer their explanations for the absence of hard evidence for extraterrestrial civilisations, in response to an article by Adam Kirsch ...

The new executive order purports to bar the children of “alien enemies” from acquiring birthright citizenship. It is wrong on multiple levels.

Tim Woodstrover plumbs the depths of why we call some extinct species 'alien' and what this means for the future of conservation ...

If humanity ever makes contact with an intelligent extraterrestrial civilization, we will have no shortage of questions.

Sea salps are the oceans living vacuum, but how do they clean the ocean? Read here about how sea salps filter debris.

A new genomic technique has revealed ghost ancestry from two unknown human lineages hidden in modern DNA. Credit: SciTechDaily.com Neanderthals and Denisovans interbred with the ancestors of modern ...

Modern humans carry DNA from two mysterious extinct lineages in addition to Neanderthals and Denisovans. Their hidden genetic legacy shows that our evolutionary past was shaped by repeated mixing ...

The Justice Department has activated a special court that's never before been used to argue for the removal of a woman accused of supporting the Islamic State. Prosecutors detailed some of the ...

UC Berkeley researchers have identified regions of DNA that humans inherited from two unknown ancestors as a result of long-ago interbreeding among modern humans and at least four other archaic human ...

In a new Science study, scientists read the family tree buried inside modern genomes and turned up "ghost ancestors" in every population on Earth that no fossil records can account for. But did our ...