clouds

A NASA sounding rocket launched early this morning and lit up the skies over the U.S. East Coast with colorful clouds, ringing in an early July Fourth celebration.

Time-lapse images recently captured an incredible sight — a "tide" of clouds rolling in to fill up the Grand Canyon.

The bizarre roll cloud and the beautiful asperitas cloud are among the additions to the latest International Cloud Atlas.

In an unexpected first, researchers have discovered ammonia in the troposphere, Earth's lowest atmospheric layer, a new study finds.

Bird poop is a messy nuisance in the Arctic, but the droppings from seabirds actually have a beneficial effect: slightly cooling the region threatened by climate change, a new study finds.

Despite recent speculation, strangely shaped clouds over the Bermuda Triangle are likely not the cause of unexplained disappearances.

A new satellite image shows complicated cloud patterns off the coast of Angola and Namibia.

Stunning new maps document a global year in the clouds in more intimate detail than ever before.

You're never alone when you're surrounded by your microbial cloud.