Methane-Spewing Microbes May Have Caused Earth's Worst Mass Extinction
Monday, March 31, 2014 - 16:01
in Earth & Climate
Sometimes bad things come in small packages.A microbe that spewed humongous amounts of methane into Earth's atmosphere triggered a global catastrophe 252 million years ago that wiped out upwards of 90 percent of marine species and 70 percent of land vertebrates.