Secrets of Giant Cloud Holes Revealed

Posted: 5 July 2011 in Stunning photos

Secrets of Giant Cloud Holes Revealed.

Mysterious holes in clouds made by aircraft may owe their huge sizes to a little bit of heat, a new study suggests.

For decades people have seen gargantuan holes form in high, thin clouds made of supercooled water—liquid droplets that are chilled below the freezing point but that don’t have any particles around which ice crystals can form.

An airplane-induced hole punch cloud.

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