In the case of mammals, the best-studied group of animals, the fossil record indicates that the “background” rate of extinction, the one that prevailed before humans entered the picture ...

Given the average species lifespan for mammals, the background extinction rate for this group would be approximately one species lost ... 30 percent of the world's animals and plants could be ...

What is unique about the current extinction rate is the speed of the loss and the unique role of one species in seeing ... conservation status of plant and animal species. The IUCN Red List ...

and animals that were eaten by the extinct animal now could end up causing overpopulation problems. Extinction cannot be addressed without addressing climate change, which is a huge factor in ...

We're in the midst of the Earth’s sixth mass extinction crisis. Harvard biologist E. O. Wilson estimated that 30,000 species per year (or three species per hour) are being driven to extinction.

Human activity has increased the rate of extinction by several orders of magnitude. A recent UN report says around one million species ... measures to save the animals they love.

Given the average species lifespan for mammals, the background extinction rate for this group would be approximately one species lost ... 30 percent of the world's animals and plants could be ...