Emergency physician Dr. Tsion Firew and NPR science correspondent Rob Stein answer listener questions about getting tested for COVID-19, and how those tests are processed.
NPR's Ayesha Rascoe speaks with Pedro Noguera, dean of the University of Southern California School of Education, about his role leading student protests at UC Berkeley against Apartheid in the 1980s.
Genetically modified seeds for purple tomatoes hit the market for home gardeners recently. But how did a purple tomato get splashed across the cover of a seed catalog specializing in non-GMO plants?