This study predicts the first mass extinctions in 13,000 years

December 31, 1969 | ATLANTA

A study of fossil pollen samples in North America shows the resilience of plants could be the lowest it's been for 13,000 years. “We find that the retreat of North American glaciers destabilized ecosystems, causing large herbivores—including mammoths, horses, and camels—to struggle for food supplies,” says Jenny McGuire.