The Devonian Mass Extinction was a turbulent, 20-million-year saga that eradicated Earth’s first forests and wiped out roughly 75% of all species. Are we on track for a repeat? Join lindsay_nikole and Colossal Biosciences for part two of our mass extinction series, as we explore the volcanic fury and oxygen-starved oceans that reshaped life on our planet forever. Watch episode two now on Colossal’s YouTube channel! | Colossal Biosciences

17 reactions | James is in the White River National Forest in an area known as Deep Creek. He and some colleagues are studying the limestone for evidence of ancient reefs that once covered most of western North America. #60secondsofscience #dmns #museumscience | Denver Museum of Nature & Science | Facebook