Over 2.5 million people a year visit Mount Rushmore in the Black Hills of South Dakota, where the world's largest presidential statues gaze at them through eyes 11 feet across. The sculpted heads of W …

Ozone is a gas, a form of oxygen, that is found in the layers of the atmosphere, most predominantly in the stratosphere. Here, 90% of the atmosphere's ozone is distributed in a ratio of five ozone mo …

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The permafrost tunnel 10 miles north of Fairbanks, Alaska, is called a "chilly, smelly time machine" because it exposes permafrost layers dating from 11,000 to more than 30,000 years ago. These layers …

What you see when you look at the moon depends on its location in relationship to the sun and Earth. The moon never goes away or changes shape-we just see a different fraction of sunlight being reflec …

Eclipses have frightened, mystified and puzzled man since antiquity. The Chinese believed that an eclipse was caused by the celestial dragon eating the Sun. Tablets found in northwestern Mexico show …

Achievements in space exploration have had an impact on science and technology around the world. The study and exploration of space is a quest for excellence and adventure, as well as a thirst for un …

You step outside on a crisp, clear night and gaze up at a sky full of sparkling stars. You wonder which one to wish upon--they're all beautiful, but so far away. Why not try wishing upon the star that …

Anyone who has ever lived through the fury of a hurricane or witnessed the destructive power of a twister knows just how much punch the wind can pack! What many people don't realize is that when they …