Time now for our science news roundup from Short Wave. That is NPR's science podcast. I'm joined by two of the show's reporters, Regina Barber and Berly McCoy. Howdy, you two. REGINA BARBER, BYLINE: ...

Robert F. Kennedy Jr has spent years railing against food additives, framing them as part of a broader threat to public health. Now, as the US health secretary, his views have taken on new weight.