Physicist Rigged His Pet Hamster's Wheel to Strava. It Runs Far Every Night

An MRI physicist in the Netherlands built a speed and distance tracker for his hamster's wheel, automatically uploading nightly runs to the hamster's own Strava account. The hamster, Mollie, logs 5-6 miles per night, has amassed over 600 followers, and even completed Strava's August 400-minute challenge in two days. The setup uses a magnet, hall sensor, and ESP32, with a script that generates a .FIT file and uploads it via the Strava API.