A Moment of Science
Why does eating salty popcorn or baked ham make you thirsty, sometimes a few hours after you've eaten it?
Eating snow to obtain water is metabolically expensive–it would take too much energy to melt down enough snow. Consequently, polar bears have evolved so that they don’t need to drink free water.
With a water shortage looming, we should all try and conserve as much of it as possible.
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