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apollyon0810 t1_isj5u15 wrote

Reply to comment by symbioticHug in TIL: Sperms were thought to move by wiggling their tails side-to-side, like eels, for 350 years. But research shows that they roll as they move forward like a spinning top. by vect77

Also…. We can SEE them under a microscope.

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ringobob t1_isjmurd wrote

We see a mostly 2D image that is difficult to discern side to side movement on a plane vs a more complicated movement in 3d space that, when seen from above, looks like side to side movement on a plane.

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