Ian Sample and science correspondent Hannah Devlin discuss some of the science stories that have made headlines this week, from a new technique that uses food colouring to make skin transparent, to the first case of bird flu in a person with no known contact with sick animals, and a study looking at premature brain ageing in young people during Covid. Help support our independent journalism at <a href="https://www.theguardian.com/sciencepod">theguardian.com/sciencepod</a>