Within minutes of impact, debris began heating Earth’s atmosphere. Fine dust trapped that heat, potentially killing the dinosaurs quickly.

A compound made only by breeding queens keeps naked mole-rat colonies infertile and free of conflict.

Common dolphins in New Zealand are biologically older than their calendar ages. Trace metals and “forever chemicals” may be to blame.

A new snake’s unique head anatomy suggests early snakes were even more diverse than thought. This one was a rare burrower.

Scientists recovered ancient human DNA from cave walls for the first time. Refined, the method could help link prehistoric paintings to their makers.

A whole-genome analysis of Beefalo, a hybrid bison-cattle breed, suggests very few individuals have any bison DNA at all, a new study reports.