3D guts and glory

July 25, 2025

💥 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.