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Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
Did you know?
To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.