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The Drinking Bird Toy That Even Einstein Could Not Explain

If you have seen the classic drinking bird toy, then you have probably wondered how it works. You might not have succeeded in explaining why it works. Some say that Einstein was baffled by it.

Engineer Bill Hammack disassembled the drinking bird toy to understand the principles behind it. What looks like red water inside the toy is actually methylene chloride. Methylene chloride boils and turns to vapor at room temperature. In fact, the drinking bird toy operates by well known thermodynamic principles.

Watch the video below to see how the drinking bird toy actually works.

What do you think?

Written by David


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