Watch Again

The Small Killer Threatening the Future of Yellowstone

Watch More
back to video

The Small Killer Threatening the Future of Yellowstone

Short | 03:09

Yellowstone National Park is one of the world's most protected ecosystems. But that's still not enough to keep its grizzly bears completely safe.

On TV

    • Tuesday
    • 9:00am
    Dec 18
    • Saturday
    • 4:00pm
    Dec 29
    • Saturday
    • 9:00pm
    Jan 12

More About This show

It's death on an unimaginable scale, when a majority of Earth's species quickly die out. It's called "mass extinction," and it's happened at least five times before. Cataclysms, such as supervolcanoes or asteroids, are thought to cause these events, but some experts believe a man-made mass extinction could be next. Is our planet in trouble? And if so, is there anything we can do to stop the next catastrophic annihilation? Experts are traveling the world, performing groundbreaking scientific detective work to answer these very questions.

Return to Video Page