Television. In 1956 a 21" RCA color tabletop TV cost $495.

Lying On The Stomach. Prone is face-down; supine is face-up.

NASA. NASA stands for " National Aeronautics and Space Administration".

Voltaic Pile. The voltaic pile, invented by Alessandro Volta in 1800, was the first electric battery.

Soil. Soil is comprised of sand, silt and clay, mixed with varying amounts of organic matter, water and air.

Cnidarians. The group called Cnidarians includes jellyfish, coral and hydra.