Way back when forests first evolved on Earth … they might have triggered one of the biggest mass extinctions in the history of the planet. What can we learn from this ancient climate apocalypse?For show transcripts, go to vox.com/unxtranscriptsFor more, go to vox.com/unexplainableAnd please email us! unexplainable@vox.comWe read every email.Support Unexplainable by becoming a Vox Member today: vox.com/membersPlease take a second to help us learn more about you! vox.com/podcastsurveyLearn more about your ad choices. Visit podcastchoices.com/adchoices