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Body & Brain

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SNOOZING JELLY  Some Cassiopea jellyfish regularly enter a sleeplike state, a new study finds.

injured soccer player

About 20 percent of U.S. adolescents have had at least one concussion. Those teens were more likely to play competitive sports than those who never had a concussion.


BUSY BRAIN The still-forming brain of a frog sends important messages to the body. When the brain is missing, the body doesn’t develop properly, a new study suggests.

Body & Brain

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