The earth is approx. 6,588,000,000,000,000,000 tons.
175
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
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
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
Sound travels about 4 times faster in water than in air.
408
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Out of all the senses, smell is most closely linked to memory.
146