In 1693, the postage rate of a letter was determined by how much light went through the letter. The less the light went through the letter the more expensive the rate would be. This technique was referred to as candling.

The present population of 5 billion plus people of the world is predicted to become 15 billion by 2080.

If Wal-Mart was classified as a country, it would be the 24th most productive country in the world.

AMAZING FACTS