Why (and how) does dew form? © Getty Images

Why (and how) does dew form?

"Dew" know the answer to this one?

Asked by: Erin Beach, Highlands

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During the day, water evaporates from rivers and lakes, and plants pull it up through their roots and release it from their leaves. In the evening, the air cools and can’t hold as much water vapour. The excess condenses into water droplets, which collects on any cold surfaces near the ground, where there is less wind.

Is it better to walk or run in the rain? © Getty Images

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