Here is a popular article about the study https://scitechdaily.com/driver-identified-of-the-largest-mass-extinction-in-the-history-of-the-earth/ https://scitech

Here is a popular article about the study https://scitechdaily.com/driver-identified-of-the-largest-mass-extinction-in-the-history-of-the-earth/ https://scitechdaily.com/driver-identified-of-the-largest-ma... Bad news in the sense that last time the atmosphere and oceans absorbed a lot of extra carbon (and too many nutrients from acid rain erosion running to rivers and oceans, causing lack of oxygen for marine life) most marine and land animals on Earth got wiped out over time, and it took millions of years for animal life to re-establish. It seems to have been caused by volcanic activity in Siberia and not dissolution of methane hydrates.