Human sperm don’t swim the way that anyone had thought
Rolling and lopsided tail flicks keep the cells moving in a straight line
![illustration of sperm](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/07/073020_ja_swimsperm_feat.jpg?fit=1028%2C579&ssl=1)
In this illustration of a swimming sperm’s position over time, the head (red) rotates as the tail (blue) beats to only one side. The combination results in straight-ahead movement.
polymaths-lab.com