Recently, paleontologists Dr. John-Paul Zonneveld, Dr. Sarah Naone, and Dr. Brooks Britt described the discovery and classification of four new ichnotaxa (fossilized trace taxa) from the Eocene ...

But as the Paleocene epoch gave way to the Eocene, it was about to get much warmer still—rapidly, radically warmer. The cause was a massive and geologically sudden release of carbon. Just how ...