Humans tend to think of our thumbs as a sign of sophistication. We need to make space for a newly discovered species of flying reptile that scientists say sports the oldest true opposed thumb (which we commonly call an "opposable thumb") ever found. The researchers nicknamed it "Monkeydactyl."
The pterosaur species Kunpengopterus antipollicatus lived during the Jurassic era in China. It was fairly small, with a wingspan of about 33 inches (85 centimeters). What makes it stand out from other pterosaurs is what appears to be an opposed thumb as seen in a fossil.