It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
People with blue eyes are better able to see in the dark.
153
The average person laughs 13 times a day!
108
95% of people feel uncomfortable when the TV volume is an odd number.
392
One million Americans, about 3,000 each day, take up smoking each year. Most of them are children.
-86
Studies suggest that people who appear to be constantly distracted have more "working memory" and "sharper brains".
13
Half of all Americans over the age of 55 have no teeth.
39
