Each of the ninety-six creatures we'll be featuring on this blog are taken from a huge 2-page spread in the middle of Evolution. So while you can see each individual creature here, you'll need to grab the book to see them all together!
EXISTED DURING: Early Permian
DISCOVERED: Texas, 1878
FUN FACT: Unfortunately there are no “fun” facts about Sphenacodon. It didn’t have a cool sail like Dimetrodon, and due to its large jaw and sharp canines it probably wasn’t much fun to hang out with.
Evolution: The Story of Life on Earth