The sound you hear when you crack your knuckles is actually the sound of nitrogen gas bubbles bursting.
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When glass breaks, the cracks move at speeds of up to 3,000 miles per hour.
423
No piece of square dry paper can be folded more than 7 times in half!
26
The world’s smallest book, “Teeny Ted from Turnip Town”, is 100×70 micrometers in size and requires a scanning electron microscope to read, as light beams are too large.
6
The most expensive license plate is the number '1', bought by an Abu Dhabi businessman - costing a staggering $14.3 million!
3
Like fingerprints, everyone's tongue print is different.
250