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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.
Did you know?
Your heart beats over 36 million times a year.
Did you know?
The average adult has about 21 square feet of skin.
Did you know?
The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.