Life on Earth may not have started here at all. A scientist says alien intervention is unlikely but still possible, reshaping the debate on our true origins.

While idea may violate Occam’s razor, “it remains a speculative but logically open alternative,” says biologist Robert Endres.

Among the most persistent claims is that extraterrestrials assisted in the construction of ancient civilizations.

Human intelligence wasn’t a cosmic evolutionary fluke, some scientists say. The case against cosmic loneliness is growing.

The sight of an open expanse stretching into infinity is a tonic for clearing cluttered minds. Promising silence, solitude and stark minimalist beauty, our world’s driest regions lure bold explorers ...

Around 250 million years ago, what is today scorching desert in remote northwestern Australia was the shore of a shallow bay ...

Nyasasaurus parringtoni may take the crown as the oldest dinosaur fossil known to science. It lived during the Middle Triassic around 243 million years ago, and left behind remains that predate other ...

At a remote and barren Sahara desert site in Niger, scientists have unearthed fossils of a new species of Spinosaurus, among ...

Two skulls from Yunxian, in northern China, aren’t ancestors of Denisovans after all; they’re actually the oldest known Homo ...

US President Donald Trump said on Thursday he is ordering federal agencies to begin “identifying and releasing” government ...

New genomic research suggests our species descended from a deep fusion between two ancient lineages — one of them a mysterious “ghost.” ...

A viral Obama podcast answer about aliens prompted Trump to accuse him of revealing secrets and promise to release UFO files ...