Science: Covid vaccines saved millions, insecticidal cat nip, keeping a beat

Science commentator Dr Siouxsie Wiles joins Kathryn to talk about research that's modelled how many lives were saved during the first year the vaccines were available, a catnip plant from Japan and China that not only gives cats endorphins - it also protects them from mosquitoes and the study that's found 69 different genetic variants linked with the ability to keep in time to a beat.