Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
4.5 pounds of sunlight strike the Earth each day.
27
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
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