Wayt Gibbs (@WaytGibbs) has the quintessential 2020 podcasts for Scientific American’s Science Talk. Wayt talks with medical ethicist Arthur Caplan about how we decide who’s first in line for COVID-19 vaccines. Then Wayt, a writer and editor for Modernist Bread, becomes the expert interviewee in a podcast on the applied microbiology of home baking. @sciam