While driving down an East Texas country road I spotted this scene. The autumn trees and the late afternoon sun made these golden bales of hay shine just a little bit more. Fortunately I had my camera with me. (c) James Q. Eddy Jr.

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This week in science: How much exercise you need, flu resistance and fortified food

NPR | By Emily Kwong,

Regina G. Barber

Published April 2, 2026 at 4:41 PM CDT

NPR's science podcast Short Wave brings us stories on food fortification, why some people don't seem to get the flu, and a study on how much vigorous exercise you really need.

Emily Kwong

Emily Kwong (she/her) is the founding reporter and now co-host for Short Wave, NPR's daily science podcast. Her first homework assignment in kindergarten was to bring in a leaf to class. She's been looking at trees ever since.

Regina G. Barber

Regina G. Barber is Short Wave's Scientist in Residence. She contributes original reporting on STEM and guest hosts the show.