Humans pose ever-bigger extinction risk to animals: review - Phys.Org

Phys.Org

Humans pose ever-bigger extinction risk to animals: review Phys.Org By 3,000 years ago, Earth had lost half of its terrestrial mammal mega-species—animals which weigh more than 44 kilogrammes (97 pounds)—and 15 percent of its birds. The human population at seven billion is now 25 times larger than it was then, and ... and more »