Things You Didn't Know About Inventors

Monday, Jan 13, 2020, 4:26 pm
By:Tony Williams


#11 Isaac Newton

Did you know that Isaac Newton made the doggy door? The cat flap had already been around, but he decided to put two flaps on his door with one being bigger than the other, so the doggy door was basically invented completely by accident, but so are a number of other items.


Isaac Newton-Things You Didn't Know About Inventors
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