💥 3D guts and glory: Caltech’s researchers built PillTrek, a tiny 3D-printed smart capsule that monitors your gut like a biochemical Fitbit. It tracks pH, glucose, serotonin, you name it, by crawling through your insides like a nerdy spy. It’s cheap, wireless, and eventually, yes, it comes out the old-school way. Consider it a poop diary with WiFi.
3D guts and glory
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