Uranus was discovered by Sir William Herschel in 1781. The planet is actually a gas giant, composed of methane, helium and hydrogen. Its temperature hovers around -355 degrees Fahrenheit. Some scientists believe that despite the cold surface temperatures, a core about fifteen times the size of earth has a temperature of approximately 12,000 degrees Fahrenheit. It possesses at least five major moons, ten minor moons, and thirteen rings. Idea: Encourage children to try to develop some kind of transport that could land on the gas giant. They could learn more at: Uranus.
“Uncle Sam” cartoon was published for the first time in 1852. Frank Bellew developed the cartoon for The New York Lantern, a newspaper.
Earmuffs were patented by Chester Greenwood of Farmington, Maine, in 1877. He was fifteen years old when he invented the Champion Ear Protectors. He had his grandmother add some fur at the ends of a piece of wire. He received patent #188,292. His invention became a factory, employing community members.
World Standard Time was accomplished in 1884. The International Meridian Conference met in Washington, DC. The group established the Prime Meridian through Greenwich and established 24 time zones. Prior to that conference, different countries used different times. In the United States, different railroads used different time systems. It was all very confusing! Children can find the time in different cities world wide at: World Clock.