Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
4.5 pounds of sunlight strike the Earth each day.
27
One barrel of petroleum holds 42 gallons.
20
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
At 15 years old, Jack Andraka invented a method of diagnosing pancreatic cancer, thus helping to save the lives of millions of people around the world. It is 168 times faster, 26,000 times cheaper, 400 times more sensitive, and has a 99% success rate.
15