There was a moment in human history when our entire existence may have desperately clung to a thousand or more people.

This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. At some point in the deep past, humans may have come frighteningly close to disappearing ...

Warnings that humanity is heading toward its own disappearance have shifted from the fringes of science fiction into mainstream research and public debate. Instead of vague prophecies, scientists now ...

Have you ever found yourself in a museum's gallery of human origins, staring at a glass case full of rocks labeled "stone tools," muttering under your breath, "How do they know it's not just any old ...

Should scientists intervene when faced with the possible self-destruction of a species? That question sits at the heart of ...

"As humans we have a unique capacity and moral obligation to steward the earth for the benefit of ourselves and all living ...