The blue whale and other baleen whales, the gentle giants of the sea, sift huge quantities of tiny prey from ocean water using a filter-feeding system in their mouths. Fossils unearthed in China's Hubei Province indicate that a curious marine reptile called Hupehsuchus nanchangensis that lived 248 million years ago in the Triassic Period employed a similar system during a time of tremendous evolutionary innovation following Earth's worst mass extinction. Unlike the blue whale, today's largest animal, Hupehsuchus was modest in size, about three feet (one meter) long.
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