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Did you know?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Did you know?
Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
Approximately 500,000 babies are born each year in the United States to teenage mothers.
Did you know?
The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).