Giant Hailstones Pummel Scientists | On Assignment

In the American Midwest's infamous Tornado Alley, giant hailstones rain down on National Geographic explorer Tim Samaras. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible. Get More National Geographic: Official Site: http://bit.ly/NatGeoOfficialSite Facebook: http://bit.ly/FBNatGeo Twitter: http://bit.ly/NatGeoTwitter Instagram: http://bit.ly/NatGeoInsta Giant Hailstones Pummel Scientists | On Assignment    • Giant Hailstones Pummel Scientists | On As...   National Geographic    / natgeo