15 Most Beautiful Natural Phenomena
| May 12, 2017
Lenticular clouds
This incredible spaceship-like cloud formation can usually be seen hanging around mountaintops and can even appear in stacked layers. Lenticular clouds occur when cool air moves over the mountains and condenses. They are unique from other clouds because they are stationary. In rare cases, these clouds can form over flat land when a front produces shear winds, often leading those who are unfamiliar with the phenomenon to confuse it with a UFO.
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