Loss of ancient grazers triggered a global rise in fires

From 50,000 years to 6,000 years ago, many of the world’s largest animals, including such iconic grassland grazers as the woolly mammoth, giant bison, and ancient horses, went extinct. The loss of these grazing species triggered a dramatic increase in fire activity in the world’s grasslands, according to a new Yale-led study published Nov. 26 in the journal Science.

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