Nels and Vincent review a preprint demonstrating that changes in the genomes of the SARS-CoV-2 variants B1.351 and P.1 allow the viruses to reproduce in mouse cells in culture and in laboratory mice. Hosts: Nels Elde and Vincent Racaniello Subscribe (free): iTunes, Google Podcasts, RSS, email Become a patron of TWiEVO Links for this episode Tony Schountz on TWiV 668 SARS-CoV-2 variants infect mice (bioRxiv) CoVariants Letters read on TWiEVO 66 Time stamps by Jolene. Thanks! Science Picks Nels – Billion years of plate tectonics Vincent – Sapiens a Graphic History by Yuval Noah Harari Music on TWiEVO is performed by Trampled by Turtles Send your evolution questions and comments to twievo@microbe.tv