Human sperm roll like ‘playful otters’ as they swim, study finds, contradicting centuries-old beliefs – CNN

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Human sperm roll like ‘playful otters’ as they swim, study finds, contradicting centuries-old beliefs – CNN

For more than 340 years, science believed a man’s sperm wiggled its way to its prize, much like a snake slithering side to side through water. Now, a new study says that movement was an optical illusion.
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