One ragweed plant can release as many as one billion grains of pollen!
51
4.5 pounds of sunlight strike the Earth each day.
27
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Iron weighs more after it rusts.
68
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
One third of the electricity produced on earth is used to power electric light bulbs!
75
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118