It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
‘Old people smell’ is actually caused by a chemical, 2-nonenal, that old people secrete through their skin
8
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
The average housewife walks 10 miles a day around the house doing her chores.
100
People with light eye colors (like blue, green or grey) have a higher alcohol tolerance.
194
One million Americans, about 3,000 each day, take up smoking each year. Most of them are children.
-86
Americans throw out 4.5 pounds of trash a day - twice that of 40 years ago.
76
