WHEN you look up at the sky on a fair weather day, you’ll undoubtedly see cumulus clouds. These big, fluffy, cotton-like clouds that lazily float above our heads don’t appear like they would weigh much – but looks can be deceiving.

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Margaret Peggy Lemone , Us National Centre For Atmospheric Research , Atmospheric Research , Quickcheck , True Or Not , Starverified , Clouds , Science , Weight , ,