From Viking to Perseverance, scientists have spent decades chasing chemical hints that could point to life beyond Earth.

Mars may be tens of millions of kilometers away, but for planetary scientists, the most revealing rehearsal space sits in the ...

From global conflict to moments of humanity, AP staff and leading picture editors select the photographs that defined 2025.

A fact check of viral claims that Mike Rogers admitted the Travis Walton UFO case was a hoax. We examine the evidence, the ...