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Baseball-Shaped Fossils Show Early Proof of Animals

Microscopic 570-million-year-old fossils from China may represent the earliest evidence for animal life on Earth, suggests a new study in the Proceedings of the Royal Society B.

Previous theories have said that the fossils represented giant bacteria.

"One of the proponents of the bacteria theory was a co-author of this paper (Jake Bailey of the University of Minnesota) and he now agrees that the fossils do not represent a giant sulfur bacteria," co-author Philip Donoghue, a professor of palaeobiology at the University of Bristol, told Discovery News.

Images previously taken by Shuhai Xiao, a professor of geobiology at Virginia Tech, reveal that many of the fossils from the Dousantuo Formation in South China look like mini baseballs and soccer balls.

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