By Susan Duclos According to a new study published Thursday by the journal Science and hailed as a "landmark" study by outside experts, the world is nearing what is referred to as the "Sixth Great Extinction," mainly from human beings destroying habitats, therefore causing species to become extinct at least 1,000 times faster than they did before humans arrived on the scene. The study's lead author,biologist Stuart Pimm of Duke University, states "We are on the verge of the sixth extinction." Five times, a vast majority of the world's life has been snuffed out in what have been called mass extinctions, often associated with giant meteor strikes. About 66 million years ago, one such extinction killed off the dinosaurs and three out of four species on Earth. Around 252 million years ago, the Great Dying snuffed out about 90 percent of the world's species.
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