The only letter not appearing on the Periodic Table is the letter "J".
180
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
The average temperature at 40,000 feet above sea level is -60 F.
56
One 75-watt bulb gives more light than three 25-watt bulbs.
57
A cubic yard of air weighs about 2 pounds at sea level.
31
Diamonds can be shattered with a hammer.
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