Siskiyou County is famous for its spectacular shows in the sky in the form of lenticular clouds, often over Mount Shasta. On ...

Footage shows the lenticular cloud resembling an alien spaceship behind a puffy mass on April 21. The bizarre cloud formation appeared tilted and was illuminated by sunlight from behind ...

Residents of La Castellana in Negros Occidental were amazed at the unusual cloud floating above Kanlaon Volcano last Friday.

The ammonia from Adélie penguin guano reacts with sulfur-containing gases in the atmosphere to aid in forming clouds, which ...

When a volcano erupts, it can spew ash high into the atmosphere—inserting aerosols right where clouds typically form. How ...

Penguin poop provides ammonia for cloud formation in coastal Antarctica, potentially helping to mitigate the impacts of climate change in the region.

When the wind blew from the direction of the colony, ammonia levels spiked, sometimes reaching 1,000 times above normal ...

Volcanic ash from eruptions can reshape cirrus clouds, forming giant ice crystals and altering how Earth traps heat in the ...

That warm air is forced upward, cools rapidly, and condenses into a low, horizontal cloud formation. This process creates the classic shelf cloud—broad, arching, and often layered like a stack ...

Biological particles like pollen, bacteria, spores and plant matter floating in the air are particularly good at promoting ice formation in clouds, and EPFL climate scientists show that these ...