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Mastodon fossil throws up questions over 'rapid' extinction

A bone tool embedded in a mastodon rib suggests humans were hunting big game earlier than thought.

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  1. Waters, M. R. et al. Science 334, 351-353 (2011).

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  2. Gill, J. L., Williams, J. W., Jackson, S. T., Lininger, K. B. & Robinson, G. S. Science 326, 1100-1103 (2009).

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Switek, B. Mastodon fossil throws up questions over 'rapid' extinction. Nature (2011).

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