The cave was supposed to stretch more than 20 miles, but they never planned to see that much of it. Deep inside, an ...

Divided into four rotating groups, 28 astronauts endured six days and five nights in the dimly lit, isolated karst caves of ...

A giant impact on the early Earth could have brought the building blocks of RNA to our planet, which new research suggests ...

New research shows how RNA, a key molecule for life, may have formed on early Earth using simple chemistry and materials delivered by asteroid impacts, linking space science with the origins of life ...