A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
Dr.Jonas Salk, the man who came up with the cure for polio, didn’t patent the drug. This made the drug more affordable to the general public, and he lost out an an estimated $7 billion dollars for himself.
41
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Cold water weighs more than hot water.
93