Cats and mice have made contributions to the world, but their contribution to science is even more indelible. Humans began to use ultraviolet rays to treat diseases. The discovery of this therapy was inspired by a cat basking in the sun, and the research was successful one day. Danish scientist Finsen saw a cat lying quietly in the open air basking in the sun. Whenever a shadow appeared, it would move its body. Finsen observed carefully and found a festering wound on the cat.
It turns out that cats are using sunlight for treatment. Finsen proved through research that only the purple part of light has a good therapeutic effect. Because of this discovery, he won the Nobel Prize in 1930. Coincidentally, when the French scientist Bernard Courtois was eating breakfast at his workbench in the chemical laboratory, a naughty cat suddenly jumped off his shoulder and knocked two bottles on the table to the ground. One was a marine plant soaked in alcohol, and the other was a piece of pig iron soaked in sulfuric acid.
The liquids in the two bottles melted together, producing a chemical reaction, and groups of purple steam rose up. When the steam disappeared, Courtois found that some nearby objects were covered with crystals. Cats also helped people invent free iodine. In addition, scientists have also found that it only takes 1/8 second for a cat to complete a turn in the air. Using this "cat spin" phenomenon, American experts have designed a set of peculiar "space exercises".
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