The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
4.5 pounds of sunlight strike the Earth each day.
27
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
A cesium atom in an atomic clock beats over nine billion times a second.
43
The smell of freshly cut grass is actually a plant distress call.
31
The bark of an older redwood tree is fireproof.
65
The force of a suction cup is calculated using F=AP.
15