Dr. Syed Moin Hassan was riled up. “I don’t know who needs to hear this,” he posted on Twitter, “BUT YOU ARE NOT LAZY IF YOU ARE WAKING UP AT NOON.” Hassan speaks to Short Wave’s Emily Kwong about de-stigmatizing sleeping in late, and why a good night’s rest is so important for your immune system. (Encore episode)

Email the show at shortwave@npr.org.

This episode was produced by Brent Baughman, edited by Viet Le, and fact-checked by Emily Vaughn.

Short Wave Podcast

It’s science for everyone, using a lot of creativity and a little humor. Join host Maddie Sofia for science on a different wavelength.