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Did you know?
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Did you know?
Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.
Did you know?
The longest a person has survived after a heart transplant is 24 years.
Did you know?
There are 20 feet of blood vessels in each square inch of human skin.

