Today, wild plants and animals are running out of places to live.
The scientists you're about to meet say the Earth is suffering a crisis of mass extinction on a scale unseen since the dinosaurs.
He remembers propellers churning the water off blaine, washington and cranes straining for the state's 200 million dollar annual catch.
Here, the vanishing wild scuttled a way of life that began with native tribes a 1,000 years ago.
A World Wildlife Fund study says that in the past 50 years, the abundance of global wildlife has collapsed 69%, mostly for the same reason.
Liz Hadly: No. Tony Barnosky: I would say it is too much to say that we're killing the planet, because the planet's gonna be fine.
Today, if the science is right, humanity may have to survive a sixth mass extinction in a world of its own making. »