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Humans have a strange reflex that no other primate has—and it might be a leftover from ancient fear
A car backfires, and your shoulders jump. A shadow moves, and your eyes fly open before your brain catches up. That dramatic ...
Reflex bradycardia is a reflexive response from the autonomic nervous system that causes the heart rate to slow. Triggers may include submerging in cold water or physical pressure on certain body ...
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