Tornadoes are some of the most destructive forces of nature. Learn how tornadoes form, how they are rated, and the country where the most intense tornadoes occur.
COSMOS: POSSIBLE WORLDS is helmed by Carl Sagan’s collaborator Ann Druyan, who boldly carries the torch forward with the 3rd season of the most beloved science show on the planet.
Billions of birds migrate annually across the Western Hemisphere… but if we don’t know where they go when they leave their breeding grounds, how can we protect them?
A Pitbull named Goliath has become very protective of his owner after he was diagnosed with a brain tumor. Cesar has been working with Goliath and his family on turning Goliath's overprotective energy into something positive.
