Video has Closed Captions
NASA's Cassini mission discovered some intriguing information about one of Saturn's moons. (1m 11s)
Video has Closed Captions
Find out how Einstein used the 1919 solar eclipse to prove his theory of relativity. (1m 9s)
What causes a solar eclipse, and how often do they occur? The answers might surprise you. (1m 6s)
Dormancy and tropism are two abilities plants have that help them survive. (1m 12s)
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