Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
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
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
One cubic foot of gold weighs more than 1,200 pounds!
78
A ball of glass will bounce higher than a ball made of rubber.
73
The average home creates more pollution than does the average car.
33
Balsa wood is classified as a hard wood!
41
One third of the electricity produced on earth is used to power electric light bulbs!
75