https://www.youtube.com/watch?v=b6utGZQ9Sks
On the river Rhine in Switzerland, there are reaction ferries: boats with no engine, no paddles, no onboard motive power at all. Here's how they work -- and a question about what other simple ideas are out there.
A short, interesting video with a closing thought that makes me want to create. Hope it does the same for some of you.
Submitted October 02, 2017 at 09:12PM by klovervibe http://ift.tt/2xaeDFw
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