Excited for the August 21 eclipse? Visit our Eclipse 2017 page to explore the science, history, and myths of the event. The Curiosity team will be viewing the eclipse alongside NASA in Carbondale, Illinois. Follow us on Facebook for live videos, trivia, and interviews on the big day.
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Key Facts In This Video
Hydras are freshwater animals that typically measure less than an inch long. 00:10
Hydras rip holes in their own sealed tissue to create a mouth when they eat. 00:35
When a hydra opens its mouth, its cells do not rearrange, but instead stretch and reform dramatically. 01:15