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Our species caused 322 animal extinctions over the past 500 years, with two-thirds of those occurring in the last two centuries.
Many animals are threatened with human-caused extinction now, with researchers expressing particular concern over amphibian and invertebrate (creatures without a backbone) losses. The numbers of the latter group have nearly halved as our population doubled in size over the past 35 years.
Ecologists, zoologists, and other scientists believe that, without urgent steps to stem the losses, we are facing global scale tipping points from which we may never look back or recover.
