Here's everything you need to know about the science of fog, accompanied by breathtaking photos of it enshrouding different parts of the world. Fog is like a cloud that touches the ground.

MARIN COUNTY, CA — Helen Caletti took this beautiful photo of morning fog flowing over the hills in Marin County, even as the ...

After the UK was battered by snow, ice, heavy rain and flooding brought by Storms Bert and Conall, parts of the country have ...