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Search Heats Up for What Wiped Out Ichthyosaurus

Likely evolved from land reptiles that dove into the ocean about 248 million years ago, the ichthyosaur extinction has stumped scientists for years.

Published On 07/27/2015
3:05 PM EDT
Shown are different ichthyosaur genuses, including Stenopterygius, a small, dolphinlike pursuit predator (top); Eurhinosaurus, a medium-size predator with a very elongated upper jaw (middle); and Temnodontosaurus, a massive apex predator. | State Museum of Natural History, Stuttgart, Germany