Tag - Earth's First Mass

Researchers Uncover Evidence of What May Be Earth’s First Mass Animal Extinction

Aaron Foster/Getty ImagesEver since the Cambrian blast 538.8 million years earlier-- a time when most of the animal phyla we're familiar with today were established-- 5 significant mass extinction events have whittled down the biodiversity of all creatures, great and tiny.Researchers from the United States have uncovered proof of one happening earlier, around 550...