The Holocene Mass Exinction Event

Given that people rarely put thesis statements at the beginning of their posts, we try to read through the posts and find a passage that expresses the spirit or aim of the post, or gives readers an idea of what they can expect if they click on the link. We have to read through many posts pretty quickly and so we may make mistakes or pick passages that the author wouldn't have picked. If the excerpt we chose wasn't a good one, then I apologize.