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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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?
The average adult has about 21 square feet of skin.
Did you know?
The human body produces and destroys 15 million blood cells every second.

