Forget solar panels — the newest green energy gadget literally yeets Earth’s extra heat into the cold void of space like a grumpy roommate opening the freezer at 3 a.m. This nocturnal Stirling engine cosplays as a tiny radiator pointed at the sky, quietly turning “it’s too hot in here” into free electricity while you sleep. It won’t power your Tesla yet, but it can run a fan or keep your greenhouse from becoming a tomato sauna, all without batteries, fuel, or guilt-tripping the sun.

New Device Generates Power by Beaming Heat to Space