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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.

More bite-sized facts

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Water.Day_women with glass of alcohol
Your hangover is literally water debt collection

That headache is your brain shrinking slightly from dehydration, demanding you pay back the water alcohol stole.

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Water.Day_trees in Redwood Forest California
Water flows uphill when nobody's watching

In trees, water defies gravity and flows upward through tiny tubes using surface tension and evaporation - no pumps needed.

Did you know?
Water.Day_cattle in the UK
Geography changes everything

UK beef uses 67 litres per kilogram because cattle eat rain-fed grass. US systems using irrigated feed consume almost 2,000 litres per kilogram.