![Heat Powered Engine Runs On Your Coffee Mug](https://hight3ch.com/wp-content/uploads/2017/11/heat-powered-engine-runs-on-your-800x440.jpg)
This machine is powered by heat, and can run off the heat from your coffee! It’s a low temperature stirling engine. It’s great for use as a teaching instrument, or just as a cool desk ornament. The engine will even stay powered for a while using just the heat from your hand. Once it cools down it’ll stop running.
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