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2:41
A tame alligator named Bubba betrays the secrets of the largest predator that ever lived.
4:28
A giant cauldron of magma simmering beneath Yellowstone is threatening to blow.
2:27
Dorothy Roseman describes her close encounters with vaccine-preventable diseases.
3:57
New technology may bypass the need to keep vaccines cold by stabilizing them with silk.
3:52
The Allies used silent wooden gliders to get behind enemy lines before the D-Day landings.
4:47
Dr. Richard Pan explains California's strategy for increasing vaccination rates.
2:55
A chance discover during a game of rugby led Dutch POWs to an ingenious WWII jailbreak.
2:58
Birds use a trick of the eye called “optic flow” to zip through forests without colliding.
5:23
In World War I, the Germans used cow guts to construct their deadly Zeppelins.
