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Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Did you know?
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
Did you know?
Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
Did you know?
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.