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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
Did you know?
There are more bacteria in your mouth than there are people in the world.
Did you know?
Approximately 500,000 babies are born each year in the United States to teenage mothers.
Did you know?
A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.