A 'jiffy' is an actual unit of time for 1/100th of a second!
66
A ball of glass will bounce higher than a ball made of rubber.
73
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
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
According to studies, men change their minds two to three times more often than women.
72
A cesium atom in an atomic clock beats over nine billion times a second.
43
A cubic yard of air weighs about 2 pounds at sea level.
31
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16