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Early hunters are guilty as charged

The spread of humanity around the world often coincided with extinctions of large animals. For example, when humans migrated to the Americas—traditionally dated to 11,000 years ago—around 135 mammalian species disappeared within a few hundred years. Similar extinctions occurred in Australia and on Pacific islands (SN: 12/4/99, p. 360: http://www.sciencenews.org/sn_arc99/12_4_99/bob1.htm). In New Zealand, roughly 40 bird species vanished within 5 centuries after the Maori arrived in the early 1300s.

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