What determines the different colors of lightning? I always made the assumption it had something to do with the different elements present in the path of the lightning bolt itself. — William C. Clancy ...

Add Yahoo as a preferred source to see more of our stories on Google. Crater Lake in Oregon looks brilliant blue because its water comes from melting snow and is extremely pure. CST Tami Beduhn, NOAA ...

Have you ever wondered why chicken eggs can be different colors? While most eggs are white or brown, they also come in colors like cream, pink, blue and green. In addition — and this is no “yolk” — ...

If you eat chicken eggs, you probably have a shell color preference for reasons you can’t explain. Some people only buy brown eggs because they believe they’re “healthier” or more “natural” than white ...

A week or so ago, I got a question on Facebook that was relayed from one of the kids of a college friend, which I'll paraphrase as "What's the physics explanation of what gives objects their color?" ...

“How can we be sure that people see the same color when they look at something?” – Henrietta, age 12, Market Harborough, UK In fact, we can’t be so sure that we do all see the same colors. What colors ...