10 Discoveries Made in National Parks

Published on Jun 12, 2016 SciShow

"Thanks to The National Trust for Historic Preservation, in partnership with American Express, for sponsoring this video celebrating 100 years of the National Park Service! Now through July 5th, you can help your favorite park win an historic preservation grant. Vote up to 5 times per day at http://VoteYourPark.org/

You might think of national parks as a nice place to see a geyser, or a big ol’ canyon, but over the past 100 years, US national parks have produced some of the biggest, oldest, deepest, and creepiest discoveries that have been made in this country!

Hosted by: Hank Green"