Summon the Basilosaurus!
Paleontologist Philip Gingerich looks for sea monsters in the Egyptian desert. He assembles fossils of ancient whales that died there when it was covered by an ocean. One such whale is the Basilosaurus, which had small hind legs.
“Complete specimens like that Basilosaurus are Rosetta stones,” Gingerich told me as we drove back to his field camp. “They tell us vastly more about how the animal lived than fragmentary remains.”