Researchers found that when giant grazers like mammoths and bison went extinct, grassland fires surged. 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 … Continue reading Extinction of Ancient Grazers Triggered a Global Rise in Fires