It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Half of all Americans over the age of 55 have no teeth.
39
95% of people feel uncomfortable when the TV volume is an odd number.
392
The Japanese, on average, are the shortest people.
320
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
34
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
Males sweat 40% more than females.
104