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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.
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).
Did you know?
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
Did you know?
There are 20 feet of blood vessels in each square inch of human skin.