The smell of freshly cut grass is actually a plant distress call.
31
One barrel of petroleum holds 42 gallons.
20
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Diamonds can be shattered with a hammer.
-104
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
The average home creates more pollution than does the average car.
33
Nylon is made from coal and petroleum.
42