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The long structures seen in manta rays and their relatives function as an early warning system, rather than a defensive weapon.
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The president’s Inaugural Address linked landing on the Red Planet with Manifest Destiny, but left many of the specifics unclear.
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Humans are known to invent private hand gestures. Chimps in the wild do, too, a new study suggests.
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Scientists suspect that contagious urination, a behavior they observed among a troop of apes in Japan, may play an important role in primate social life.
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Brandon Williams served aboard a nuclear submarine and represented a New York congressional district for one term, but has said little about his experience in the management of atomic weapons.
