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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?
In 1864, the first barbiturate (barbituric acid) was synthesized.
Did you know?
In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
Did you know?
Thyroid conditions may make getting pregnant impossible.
Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.