Nylon is made from coal and petroleum.
42
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Sound at the right vibration can bore holes through a solid object.
134
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
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
In zero gravity, a candle's flame is round and blue.
16
One barrel of petroleum holds 42 gallons.
20