How human sperm really swim – BioNews

Research using high-precision 3D microscopy has overturned 350-year-old observations about how sperm swim. 
Antoine van Leeuwenhoek, a pioneer of 2D microscopy described human sperm cells swimming by lashing their tails from side to side ‘like that of a snake or an eel swimming in water’. However, a recent study has shown this was due to an optical illusion. Researchers from Bristol and Mexico discovered that human sperm cells actually move by lashing their tails to one side. 
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