The bark of an older redwood tree is fireproof.
65
One third of the electricity produced on earth is used to power electric light bulbs!
75
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Aluminum used to be more valuable than gold!
84
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
4.5 pounds of sunlight strike the Earth each day.
27