Two recent papers by paleontologist Nicholas Longrich and his colleagues describe some unexpected findings in phosphate mines of northern Morocco.^1,2 Most surprisingly, they found a pair of short-armed carnivorous dinosaurs mixed in with fish, sharks, and marine turtles in the same layer.¹ Their second discovery was a 26-foot-long, previously unknown mosasaur with “bladelike” teeth that was also found in the same formation as the dinosaurs and marine creatures.² Why are dinosaurs and mosasaurs in the same marine rocks? Located in the Khouribga...