Even as covid-19 cases keep going up, we’ve had some good news about possible vaccines for coronavirus. Two of the promising vaccines are mRNA vaccines, and on this week’s show Anna Blakney, an RNA bioengineer at Imperial College London, explains all about this new technology. Also on the podcast: we highlight research into systemic racism and the role it plays in socioeconomic disparity, healthcare outcomes, and even technology. We explore the controversy around the species thought to be the earliest member of the human family. And then there’s a look at the brain-upgrading power of living electrodes, and news about a very, very hangry caterpillar. On the pod this week are New Scientist journalists Rowan Hooper, Tiffany O’Callaghan and Layal Liverpool, and science writer Mike Marshall. Sign up to Mike’s newsletter about the evolution and prehistory of the human species here. To read more about the stories, subscribe at newscientist.com/podcasts.

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