Back and forth, up and down. Swinging in a swing is almost like flying. What makes the swing go up in the air? Most of the time you do. You \”pump” with your legs and body. Sometimes you can get a…
Most scientists think our sun began as an immense cloud of gas and dust. Stars that are growing old often shoot out enormous clouds of gas and dust. The gas and dust are made up of all kinds of…
Muscular dystrophy. The term muscular dystrophy refers to an inherited group of diseases that cause muscles to weaken and waste away. The muscular dystrophies usually attack the muscles that control…
Recent Comments