Natural factors usually occur at a slower rate than human factors and therefore cause a lower extinction rate. Human activities occur at a faster rate and cause higher extinction rates. Human activities are mostly responsible for the present extinction rates. read more
Recent findings in Tasmania prove that certain ancient species, like the giant kangaroo and marsupial rhino and leopard, were still inhabiting the island when humans first arrived, leading the research team to conclude that the animals' extinction was due to human hunting, not the Ice Age. read more
Humans are causing the sixth mass extinction in the history of the Earth, say biologists from Stanford University, the University of California, Berkeley, Universidad Nacional Autónoma de México, the University of Florida, and Princeton University. read more