Half of all Americans over the age of 55 have no teeth.
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It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
People who have a strong friendship possess the ability to communicate with one another through facial expressions.
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Up to the age of six or seven months a child can breathe and swallow at the same time. An adult cannot do this.
165
You share your birthday with at least 9 other million people in the world.
201
Approximately 4 to 5% of the U.S. population has one or more clinically significant phobias in a given year. Specific phobias occur in people of all ages. The average age of onset for social phobia is between 15 and 20 years of age, although it can often begin in childhood.
30