Aristotle’s early insights into action and reaction anticipated complexities beyond Newton’s third law, revealing timeless wisdom.

Human sperm cells and some microorganisms swim by deforming their bodies in a way that breaks Newton’s third law of motion – and we’re closer to understanding how they do it. The findings could ...

Human sperm can swim through surprisingly viscous fluids with ease – and they seemingly defy Newton's third law of motion to do so. To figure out how they slither through substances that should, in ...

Newton’s third law tells us that for every action, there’s an equal reaction going the opposite way. It’s been reassuring us for 400 years, explaining why we don’t fall through the floor (the floor ...