Play-Doh was first manufactured as a wallpaper cleaner.
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The first household refrigerators cost about $16,000, in today's money!
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"Big Ben" in London isn't a tower, the bell inside the tower is called "Big Ben", the tower itself is called "The Elizabeth Tower".
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The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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An Australian study found that homework is of little to no academic value to students in elementary and junior high schools.
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'Second Street' is the most common street name in the U.S.; 'First Street' is the sixth! "
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