The mother of famous astronomer Johannes Kepler was accused of being a witch. | The Great Pyramid at Giza in Egypt holds a constant temperature of 68 degrees Fahrenheit. | Human tapeworms can grow up to 22.9m. | Of all the days of the week, the most popular day for people to eat ice cream is Sunday. | In the last 3,500 years, there have been approximately 230 years of peace throughout the civilized world.