Most Of The Earth's Species Are About To Be Destroyed In A Giant Mass Extinction

Approximately 65 million years ago, when the dinosaurs went extinct, 75% of the planet's many species went with them. It was the world's fifth, and most recent, mass extinction event.  Now, according to a July 25 review in the journal Science, the Earth seems to be at the cusp of a sixth mass extinction. Only this time, an asteroid is not to blame. We are. "Human impacts on animal biodiversity are an under-recognized form of global environmental change," the team of ecologists and biologists w...