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Discovery pushes back date of first four-legged animal

But controversy surrounds 400-million-year-old fossilized tracks.

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Warsaw University

Uppsala University

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Dalton, R. Discovery pushes back date of first four-legged animal. Nature (2010). https://doi.org/10.1038/news.2010.1

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  • DOI: https://doi.org/10.1038/news.2010.1

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