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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?
Thyroid conditions may make getting pregnant impossible.
Did you know?
During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.