Sperm caught breaking Newton’s third law of motion

Human sperm cells and a few microorganisms swim by deforming their our bodies in a means that breaks Newton’s third law of motion – and we’re nearer to understanding how they do it. The findings may finally encourage researchers to develop tiny robots that additionally violate this law as they swim.

Famously, Newton’s third law could be summed up within the phrase “for every action, there is an equal and opposite reaction”. This signifies that as you push towards a wall, the wall pushes again on you. …