May 21, 2025
The modern toothbrush came into use about 1938 following the invention of nylon. Previously, toothbrush bristles were made with animal hair.
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May 20
What country is the hair transplant capital of the world? -
May 19
Why is there a 352-foot-tall doric column on the banks of Lake Erie? -
May 18
What routine medical procedure has put the vice president in charge several times? -
May 17
How much money do astronauts earn while stuck in space? -
May 16
How many times does an average person swallow each day? -
May 15
How do cans of diet and regular soda react differently in water? -
May 14
Which mountain is the most climbed? -
May 13
How are porcupines used to decorate clothing? -
May 12
What monthly occurrence is always a holiday in Sri Lanka? -
May 11
How frequently is a baby born in the U.S.?