It took approximately 2.5 million blocks to build the Pyramid of Giza, which is one of the Great Pyramids. See more

Thomas Edison designed a helicopter that would work with gunpowder. It ended up blowing up and also blew up his factory. See more

McDonalds calls frequent buyers of their food heavy users. See more

Americans ate eight million more orders of french fries and almost six million more hamburgers this year compared to last. See more

The Netherlands has built 800 miles of massive dikes and sea walls to hold back the sea. See more

One pair of rats has the potential for 15,000 descendants in a year. See more

A female can produce up to twelve litters of twenty rats a year. See more

Male and female rats may have sex twenty times a day. See more

The rat has been called the world’s most destructive mammal - other than man. See more

Rats destroy an estimated 1/3 of the world’s food supply each year. See more

Each card in a deck represents a king from history: Spades- King David, Hearts- Charlemagne, Clubs-Alexander the Great, Diamonds- Julius Caesar See more

Coca-Cola used to contain cocaine when it was initially introduced. See more

Acorns were used as a coffee substitute during the American Civil War. See more

Chocolate was used as medicine during the 18th century. It was believed that chocolate could cure a stomach ache. See more

Consuming chocolate was once considered a sin during the 16th and 17th century. See more

The only "real" food that U.S. Astronauts are allowed to take into space is pecan nuts. See more