PITTSBURGH (KDKA) - On beautiful days full of sunshine, sometimes some puffy clouds develop that look like cotton balls. These "fair weather cumuli" form because of certain atmospheric conditions. You ...

NORFOLK, Va. — Spotting a cumulus cloud is pretty easy. The clouds resemble pieces of cotton candy, but why are cumulus clouds fluffy and not flat? To fully understand why, we need to start with the ...

Add Yahoo as a preferred source to see more of our stories on Google. GRAND RAPIDS, Mich. (WOOD) — Just because something floats doesn’t mean it is weightless. A great example is when oil is poured ...

FARGO — Have you ever noticed that many summertime clouds have flat bottoms and billowy tops? Cumulus clouds form on updrafts — rising columns air made buoyant by humidity and heat from the ground ...

When the moon passes in front of the sun during a solar eclipse and ushers in an uncharacteristic darkness, nature tends to react. Birds cease their chirping. Buzzing bees return to their hives. And ...

We stare at clouds all the time, whether trying to figure out what they look like or if they're bringing rain. Yet most of us know very little about clouds, let alone how to identify them. The World ...

GRAND RAPIDS, Mich. (WOOD) — Just because something floats doesn’t mean it is weightless. A great example is when oil is poured onto water. The oil will float on top of the water, but that doesn’t ...