Scientists have discovered a fascinating new way that women might choose between men to father their babies - and the choice may happen after having sex. It turns out that a woman’s egg can itself choose between the sperm of different men - and the egg may not always agree with the woman’s choice of partner.In the pod this week are New Scientist journalists Rowan Hooper, Penny Sarchet, Donna Lu and Valerie Jamieson. They discuss how a form of mate choice seen in many kinds of insects and other animals has now been shown in humans.They also bring you up to speed on the breakthroughs that are bringing the long-awaited dream of nuclear fusion closer to reality, they explore a macroscopic-sized quantum entity that has been created on board the International Space Station, hear about the biggest land animal ever to exist, and they discuss the disturbing rise of online misinformation and vitriol around covid-19. To find out more, subscribe at newscientist.com/podcasts.Please vote for New Scientist Weekly for the Listeners’ Choice award at the British Podcast Awards: https://www.britishpodcastawards.com/vote Our GDPR privacy policy was updated on August 8, 2022. Visit acast.com/privacy for more information.