Even Ultimate Cat Lovers Don’t Know These Feline Facts

Cat Doors Might Be An Isaac Newton Invention

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Many people credit physicist Sir Isaac Newton for having invented cat doors. Whether or not it’s an urban legend, it apparently takes a genius to think that cats need their own tiny doors to walk through.

As the story goes, Newton was constantly interrupted by cats scratching at his door while at Cambridge. To fix this, he had the university carpenter saw holes into his door so the cats could just walk right through!