Harvard earns enough money from interest on its endowment that it could offer free tuition to every student and still profit.
13
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
Since 1982, a radio frequency emanating from Russia has been broadcasting a buzzer-like sound and, periodically, an unknown voice reads orders, names, and numbers. No one knows where exactly it is coming from or what it means.
13
Daydreamers are better at solving complex problems.
28
Pollen can travel up to 500 miles in a day.
40
Water is actually naturally blue.
48
Real diamonds do not show up on x-ray.
36
The first household refrigerators cost about $16,000, in today's money!
47