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Water.Day_view on planet earth from space
When gravity nearly disappears

On the ISS, surface tension pulls liquid into the smallest shape. Boiling generates bubbles 30x faster than on Earth.

More bite-sized facts

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Water.Day_water droplets on car window
Water can be liquid at -40°C without freezing

"Supercooled" water stays liquid way below freezing until you tap it—then it instantly turns to ice before your eyes.

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Water.Day_town with frozen river
Water is the only substance that expands when it freezes

Frozen water expands 9%, cracking pipes and splitting rocks—but it also makes ice float, keeping fish alive.

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Water.Day_young people standing in the water in Paris
25-30 daily water encounters

Recent studies show young adults have approximately 25-30 direct water interactions daily – more than once every waking hour.