The world of the dinosaurs just got a bit more bizarre with a newly discovered species of freshwater shark whose tiny teeth resemble the alien ships from the popular 1980s video game Galaga. These were small fish, not the typical giant dinosaur size, and resembled the modern day carpet sharks.
Link: https://www.sciencedaily.com/releases/2019/01/190121103414.htm
Source: Science Daily / University of Toronto