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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 with ice in glass
Drinking cold water burns more calories than warm

Your body uses energy to heat cold water to body temperature, burning about 8 extra calories per glass.

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Water.Day_Women in Bed waking up
You literally lose a bottle of water sleeping

Your body loses about 0.47 liters of water just through overnight breathing - that's why you wake up naturally thirsty.

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Water.Day_woman hand on forehead
2% water loss = major brain fog

Losing just 2% of your body's water content can impair concentration, increase anxiety, and make tasks feel significantly harder.