Through experiments comparing living representatives of animal groups that dominated Paleozoic oceans with those that thrive today, Stanford scientists have directly linked the disappearance of once-dominant marine groups to intolerable heat and diminished oxygen in ancient oceans.

Through experiments comparing living representatives of animal groups that dominated Paleozoic oceans with those that thrive today, Stanford scientists have directly linked the…

A Stanford-led study has provided the strongest evidence yet that warming oceans and declining oxygen levels caused Earth's largest mass extinction around 252 million years ago.…