Crayfish came from China, not North America

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Crayfish originated in China, not North America as commonly believed, according to a researcher at the Chinese Academy of Sciences.

Not that it matters much to the Chinese people for whom the fresh crustaceans are a favorite snack on summer nights－but it is good to know.

Shen Yanbin at the Nanjing Institute of Geology and Paleontology said the oldest fossil crayfish found in China dates to 124 million years ago, while the oldest one found in North America can only be traced back 100 million years.

"By far it is the earliest fossil crayfish found in the world," said Shen, who has scrutinized and researched hundreds of fossil crayfish unearthed in Liaoning province, together with his colleagues.

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