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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Did you know?
Medication errors are more common among seriously ill patients than with those with minor conditions.
Did you know?
There are more bacteria in your mouth than there are people in the world.
Did you know?
The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.