Have you ever gazed up at the sky and wondered why clouds look so incredibly different from one another? One moment, you spot ...

SAN JUAN, Puerto Rico — A massive cloud of dust from the Sahara Desert blanketed most of the Caribbean on Monday in the ...

Cody Hanson shared this video, which was taken near Sunburst in Toole County, about 10 miles south of the US-Canada border.

Often, these are fair-weather clouds that form when the Sun warms the ground and the warm air rises. You’ll often see them on humid summer days. However, if the air is particularly warm and ...

The strange-shaped cloud was visible across Los Angeles and San Diego moments after a rocket blasted off into space.

Harvard researchers demonstrate how cloud-to-ground lightning strikes could have created the building blocks for life in the young Earth. One of the most fundamental questions in science is how ...