World's Oldest Sperm Discovered in Ancient Crustacean

German biologist Renate Matzke-Karasz beamed at the virtual fossil slices on her iPad. “There are definitely internal structures in this animal, and perhaps even sperm!” she emailed retired Australian micropaleontologist John Neil, wanting him to be the first to know. It would take five more years to confirm, but Matzke-Karasz was actually looking at the oldest petrified sperm in the world.