Iron weighs more after it rusts.
68
Hot water can freeze faster than cold water.
181
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The bark of an older redwood tree is fireproof.
65
Sound travels fifteen times faster through steel than through air.
134
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 only letter not appearing on the Periodic Table is the letter "J".
180
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42