Critical Mass: A Biodiversity Atlas
Track biodiversity across the United States and Canada with these interactive maps.


  Unexplored Spaces
Study of little known habitats is changing our understanding of just how diverse life is.


    Forums
Post your solutions to the extinction epidemic—and observations on the side effects of sprawl.

Sixty five million years ago, say geologists, a meteorite made cataclysmic contact with Earth. It was the beginning of the end of the dinosaurs, Earth’s last great extinction.

The next great extinction will be more fizzle than fireworks. In fact,
it’s already begun.

Biodiversity, the very variety of life, is under attack. Paving and populating, consuming and polluting, humans are causing species to vanish at a rate unequalled since the doomsdays of the dinosaur.

More is at stake than simply the spice of life. Each species takes its secrets to the grave: potential solutions to coming crises, possible cures to medical mysteries.

See how much we stand to lose , find out how much we have to learn, and sound off on the state of nature—all in this Millennium installment.