Coronae glow on the tips of spruce needles, induced by charged metal plates in a laboratory. (William Brune) For the first time, meteorologists have glimpsed the tiny bursts of ultraviolet light ...

Whether you're thinking about a hike up a mountain or just seeing it from a distance, these are the best mountains and highest points across the U.S. you should be visiting.

There’s a lake in Washington that’s so impossibly blue, you’ll wonder if someone dumped a thousand bottles of food coloring into it when you weren’t looking. Lake Crescent near Port Angeles isn’t just ...

So, you've spotted some unfamiliar eggs in your garden. What next? Here are some tips for identifying common animal eggs and what to do when you find them.