Before dinosaurs ruled Earth, something wiped out roughly 60% of all life on the planet. Past research showed that this extinction corresponded with a release of carbon dioxide into the atmosphere, possibly from a massive volcanic area, but researchers have struggled to pinpoint when eruptions occurred. A new study confirms there was volcanic activity at the same time as the extinction about 200 million years ago.
Inside the White House with D.C.'s most wired reporter. Sign up for Mike Allen's Axios AM.
More stories loading.