Why is the sky blue? People have been asking this question for centuries. The generally accepted scientific explanation for blue sky was first proposed by Lord Rayleigh, a British physicist and math …

Trying to understand why the dinosaurs became extinct has become one of the great geological detective stories. Some recent findings from the small Mexican village of Chicxulub have given scientists n …

Picture it. You're sitting on the sofa watching another fun-packed episode of Newton's Apple when out of nowhere, you hear a dull roar. The room starts to shake, pictures fall off the wall, and for a …

…

Run your finger along the equator on a globe. What do you see in your mind's eye as your finger passes over continents and oceans? Tropical rain forests? Houses on stilts? Blazing temperatures? Stop y …

It's hard to believe that a small, slow-running stream could cause harm. During a flood, however, even the calmest brook can become a torrent and cause unforeseen misery and damage. Many people like t …

…

Edwin Hubble's proof that the universe is dynamic and that our Milky Way is not the lone galaxy provoked a renewal of questions and theories. Understanding the positions, distances, and distribution …

It's hard to imagine scientists having much to do with garbage. But as the solid waste crisis grows, simple garbage disposal will require some high-tech solutions. While getting rid of garbage has alw …

There's nothing as eye-catching as a piece of fine jewelry covered with beautifully colored gemstones. Natural gemstones, however, are simply mineral crystals whose chemistry and structure make them l …