Oumuamua’s strange behaviour has a natural explanation, no aliens needed; Great apes spin to make themselves dizzy — apparently just for kicks; A sensor equipped surgical glove could help make delivery of babies safer; The process of elimination — how tiny insects pee 300 times their own weight every day; A new scale for atmospheric river intensity is helping us understand them; Extreme weather is increasing — so much that it’s changing earth’s gravity; Listener Question: Why do geese sometimes fly north in winter?