As human populations grow, pollution soils the environment and infrastructure develops, our natural habitat suffers. This may sound familiar, but scientists sent a resounding message today when they announced in a comprehensive five-year global wildlife review that these human-based causes and more are threatening one in four of the world's 5,487 known mammal species and have put 188 species in the critically endangered category.
Scientists find evidence that, thanks to droughts, humanity was once on the brink of extinction
By Matt RansfordPosted 04.25.2008 at 2:09 pm 5 Comments
If we don't get our act together in time and we push this planet past its limits, to the point where things get disaster-movie bad, at the very least we can take solace in the fact that we've been there once before. According to new research out of Stanford University, the human species was on the brink of extinction 70,000 years ago due to an extended drought. It shrunk the human population to a number perhaps as low as 2,000.