The bark of an older redwood tree is fireproof.
65
Iron weighs more after it rusts.
16
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
A cesium atom in an atomic clock beats over nine billion times a second.
43
The sun is 330,330 times larger than the earth.
75
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
According to studies, men change their minds two to three times more often than women.
72
