This is a very rare scene in the sky. A recent study reveals that these punches are formed by airplanes. According to scientists droplets in clouds exist in a supercooled state, well below freezing, yet remain in liquid form. When planes go through these clouds, they cause a drop in temperature that freezes these droplets. As a result part of the cloud gets converted into ice crystals forming a punch hole. These ice crystals fall to earth in the form of snow or rain. So, this is another way airplanes mess around with the weather.
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