A few days ago, we received this incredible picture from Ann Connolly showing a pretty cool cloud formation over the Great Sacandaga Lake: Of course she wanted to know… what type of cloud is that?!?

A stunning photograph captured by an astronaut aboard the International Space Station (ISS) and released by NASA reveals a towering cumulus congestus cloud, set against the backdrop of the Arabian ...

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This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more information, visit the Smithsonian's ...