Best Of: Ethan Hawke / Tim Robbins

This week on Shortwave, the internet is obsessed with inflammation. And yeah, it is true. Inflammation is at the heart of nearly every disease in the body. But it's also the body's natural response to danger. So who really needs to be worried about it?

Find out on Shortwave, the science podcast from NPR. From WHYY in Philadelphia, this is Fresh Air Weekend. I'm Tanya Mosley. Today Ethan Hawk, he stars in the new movie Blue Moon, about lyricist Lorenz Hart, half of the Broadway duo Rogers and Hart. Hawk also appears in the new streaming series The Lowdown.

Now 55. He's been making movies since he was 13, and sometimes, he says, he forgets just how old he is. Now I'll be sent a script and it says, Billy, age 19, skateboarding down the street, and I always think, oh, that's my part. It takes me a while to realize, oh, Billy's father, age 55, gruff and Weathered around the edges.

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