You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
There's a regenerative candle that creates a new candle as it melts.
20
The world's tallest snowman was created in Bethel, Maine in 2008. It measured in at 122 feet / 1 inch and weighed 13,000,000 lbs.
10