Tattoos are permanent, but a new technique developed by researchers at the University of Colorado Boulder allows them to be turned on and off. In a study in Matter & Light, researchers detail a technique using photochromic dye in tiny plexiglass spheres as tattoo ink. — Read the rest

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In case you’ve missed it, we relaunched our Weekender newsletter earlier this year, adding some fun recurring segments (trivia! “This Effing Guy!”) and refocusing it on the “funny, surreal, and strange in U.S. politics and culture.” I joined publisher Joe Ragazzo this afternoon for a little preview of tomorrow’s Weekender, which will categorize the different ways Republicans are trying to cope with their grim prospects in the midterms.

We also touched on kid stuff (I’m about to have my second), tattoos, the prospect of an AOC 2028 presidential run, and some other fun topics. Check out the full live below, and see more TPM conversations on our YouTube channel.