At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Indoor pollution is 10 times more toxic than outdoor pollution.
62
One 75-watt bulb gives more light than three 25-watt bulbs.
57
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
The smell of freshly cut grass is actually a plant distress call.
31
The force of a suction cup is calculated using F=AP.
15