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5:23
In World War I, the Germans used cow guts to construct their deadly Zeppelins.
2:57
Sloths may be cute, but they’re covered in a surprising number of creepy crawlies.
5:01
Did a lethal plague kill thousands in ancient Rome? Centuries-old DNA may hold the answer.
3:07
A "cosmic fingerprint" reveals the universe’s beginning and gravity's microscopic secrets.
3:25
Science shows it’s a small world after all—and nature’s networks follow a similar pattern.
4:28
A giant cauldron of magma simmering beneath Yellowstone is threatening to blow.
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.
2:58
Learn about the traits we most prize in dogs, and the bizarre jobs they were bred for.
