Astrophysicist Dr. Bryan Gillis is back! And here's here to talk about... sperm? Well, when a science headline claims that sperm is violating Newton's 3rd Law, that's when the science police have to lay down the law, no matter how weird the topic. But before you think this is just a bad journalist, the paper may actually be where the problem is... Bryan explains the whole damn thing. Public articles: https://www.newscientist.com