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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
Did you know?
More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
Did you know?
The longest a person has survived after a heart transplant is 24 years.
Did you know?
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.