The World's Most Surreal Natural Phenomena Are Finally Explained
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Pouch-Like Clouds
Pouch-like clouds, also known as Mammatus clouds are extremely rare and if you ever happen to witness them, you might find it hard to believe that they exist. The unnatural phenomenon is formed in the shape of hanging pouches and are usually composed of ice.
Wikipedia
They can be huge, extending hundreds of miles and staying visible in the sky for about 10 to 15 minutes each time.
