Chris Joyce

How do you prove a rock was actively shaped and used as a tool more than 3 million years ago? Scientists found a kit of more than 140 artifacts in one spot and say the tools' crafters were pre-human.

Scientists working in East Africa say they've unearthed the oldest stone tools ever found. They were apparently made 500,000 years before the human lineage evolved.

A team led by Sonia Harmand from Stony Brook University in New York found the tools in Kenya, near Lake Turkana. It's an area ...

Scientists have recovered cultivated wheat DNA from an 8,000-year-old submerged site off the British coast. The finding suggests hunter-gatherers were trading for the grain long before they grew it.

Business and corporate leaders are starting to take climate risk seriously enough to put money on the table to do something about it.

A crowd of wildlife rangers gathered on a woody hillside in Nepal last year to try something they'd never done before. A man held what looked like an overgrown toy airplane in his right hand, arm cocked as if to throw it into the sky. As his fellow rangers cheered, ...

If you could travel back in time about 8 million years, you'd find a creature in an African tree that was the ancestor of all current apes and humans. And that creature in all likelihood would have spent a big part of its day munching leaves and fruit — pretty ...