Look at this massive UFO…
It was refueling over the Etna volcano on June 14, 2016.
Lenticular clouds are more or less isolated clouds, which form in the Earth’s troposphere (the lowest level of the atmosphere).
They are saucer- or lens-shaped clouds, which are typically stationary in nature.
The interruption in airflow creates a wind wave pattern in the atmosphere on one side of the mountain.
At the top of these waves, moisture in the air condenses and forms a cloud.
As air moves down into the trough of these waves the water evaporates again, leaving behind clouds in a characteristic lenticular shape.
Lenticular clouds have been divided into three different categories, altocumulus standing lenticular, stratocumulus standing lenticular, and cirrocumulus standing lenticular, depending on the height at which they may be found above the surface of the Earth.
On account of their typical shapes, lenticular clouds have been mistakenly identified as Unidentified Flying Objects (UFOs) in the past.