While clouds seem light and wispy as they float overhead,
they actually contain vast amounts of water vapor.
When measured, even a typical cumulus cloud,
the kind often seen in a blue sky,
can contain up to 1.1 million pounds (or 500,000 kilograms) of water.
This astonishing weight is suspended in the atmosphere because the water droplets are spread out and kept aloft by rising air currents,
creating the illusion of weightlessness even though,
collectively, clouds carry the mass of hundreds of cars above our heads.