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

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

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

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

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

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

McDonalds calls frequent buyers of their food heavy users. 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

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