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Do you want the good news or the bad news first? Well, we’re pessimistic bloggers, so let’s go with bad news first: 15 to 42 percent of mammal species have become extinct since humans arrived on this Earth. In fact, a recent study coauthored by Anthony Barnosky, a professor of integrative biology at UC Berkeley, suggests that we’re “well on our way” to Earth’s sixth mass extinction.

The good news? No more pesky rodents constantly underfoot, with their … adorable whiskers and bright, intelligent eyes.

OK, not much of a silver lining. Especially when the study suggests that most of this mammal-dying is due to man-made causes like “habitat destruction, pollution, and now global warming.”

If we increase our conservation efforts, Barnosky says, there’s still a chance at staving off another mass extinction. “By demonstrating that we have already lost 15 to 42 percent of mammalian diversity, read more »