Scientists found a “lost world” of animals that shouldn’t exist yet

A newly identified fossil site in southwest China is changing scientists' understanding of how complex animal life first developed on Earth. The discovery shows that many major animal groups were already present before the Cambrian Period began. The research was led by teams from Oxford University's Museum of Natural History and Department of Earth Sciences, along with Yunnan University in China, and was published on April 2 in Science.

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