Dana Meachen Rau

The world is filled with machines that make our lives easier. Many of these machines are run by electricity, but you also can use your own power to run machines as well. You power your bicycle you open a door you move a box. Simple machines are devices with very few parts that help us move objects. Learn about the basic simple machines that we use every day.

Discusses the sense of touch and how it affects the body.

Describe la vida de María Antonieta, incluyendo su infancia en Austria, su lujoso estilo de vida y el asunto del collar de diamantes. Describes the life of Marie Antoinette, including her childhood in Austria, her lavish lifestyle, and the Diamond Necklace Affair.