Early Humans Not Responsible For Ancient Megaherbivore Extinctions In Africa, Says Study Scientists absolved human ancestors from the mystery of the disappearance of megaherbivore species in Africa. Instead, the decline of global atmospheric CO2 caused by the expansion of grasslands might have killed many large mammals. by Diane Samson
Science Ancient Predators Cave Hyena And Saber-Toothed Cat Can Take Down Giant Mammoths, Other Megaherbivores by Katherine Derla