The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
A cesium atom in an atomic clock beats over nine billion times a second.
43
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
The average temperature at 40,000 feet above sea level is -60 F.
56
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Billions of neutrinos pass unnoticed through your body every second.
6