Even though floss and toothpick have been around since prehistoric times, the first commercial floss was manufactured in 1882.
👉 https://wonderopolis.org/wonder/who-invented-dental-floss
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Every tongue print is different from the other.
Scientists even claim that tongue prints are going to revolutionalize identification methods.
👉 https://www.scienceabc.com/innovation/how-tongue-prints-are-going-to-revolutionize-identification-methods.html
.. that the largest mammal on earth, the Blue Whale has no teeth! However, they don't need them as they eat krills, a type of zooplankton. They use their baleen plates to filter out their meail from the water: 7900 lb of krill every day!