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
Harvard earns enough money from interest on its endowment that it could offer free tuition to every student and still profit.
13
A pipe 2 feet in diameter will allow four times more fluid to pass through it than a pipe 1 foot in diameter.
20
Leather skin does not have any smell. The leather smell that you sense is actually derived from the materials used in the tanning process.
23
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
Linen can absorb up to 20 times its weight in moisture before it feels damp!
46
The full moon causes a tidal wave to roll up the Amazon river once in day and once in night for a period of only three weeks in a year. This results in continuous 4m high wave that can be surfed for up to 13km.
14