Author J K Rowling wrote the final chapter of the last Harry Potter book in "something like 1990", seven years before the release of the first book.
7
Standard paper cannot be folded in half more than 7 times.
232
Tsunamis ( tidal waves ) travel as fast as jet planes.
97
Chrysler built B-29's that bombed Japan, Mitsubishi built Zeros that tried to shoot them down. Both companies now build cars in a joint plant called Diamond Star.
29
Only 8% of the world’s currency is physical money. The rest exists only on computers.
20
"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".
18
You can start a fire with ice.
367
Each year, more than 50,000 people are injured by jewelry in the U.S.
29