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 ...

Isaac Newton’s third law of motion famously states that for every action, there is an equal and opposite reaction: If you push an object, for example, the object pushes back against you with equal ...

Breaking the laws of physics is a big no-no – unless you happen to be a sperm. Earlier this year, a team of researchers at Kyoto University in Japan found that microorganisms such as sperm and some ...