Why Do Stars Shine Only at Night?
Why Do Stars Shine Only at Night? Though stars seem to disappear when daylight comes, there are really stars in the sky all day, and their l
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Light
How Do Chameleons Change Color?
The chameleon is famous for changing color. Some can change from green to brown, or to red or yellow. This little lizard can change colors b
How Do Mirrors Work?
Most mirrors are made of a sheet of polished glass with a thin coat of silver paint on the back. The silver backing reflects the light that
What Happens to a Lost Balloon?
What Happens to a Lost Balloon? The toy balloon sold at fairs that tugs on the end of a string is filled with a gas that is much lighter tha
What Is a Light-year?
Space is so vast that scientists don’t use miles to measure how far stars are away from us. The number of miles would be too large to work w