Snow isn't always white; algae can make it look green, red, or orange, and scientists are trying to understand how and why these colorful patches appear. Quick question. What color is snow? If you ...

Some of you may be looking out the window right now at a beautiful blanket of white snow. But did you know sometimes snow can look green or orange or red? Here's a story from NPR's Nell ...

Snow isn't always white; algae can make it look green, red, or orange, and scientists are trying to understand how and why these colorful patches appear. Some of you may be looking out the window ...