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Did you know?
Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.
Did you know?
There are approximately 3 million unintended pregnancies in the United States each year.
Did you know?
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.