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Water.Day_man showing tears
Your tears have the same salt level as the ocean

Human tears contain about 0.9% salt - nearly identical to seawater, like your body remembers where life began.

More bite-sized facts

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Water.Day_open watermelon in water
Watermelon contains half a bottle

Eating 300g of watermelon gives you 276ml of highly bioavailable water plus vitamins – more efficient than plain water alone.

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Water.Day_minerals in water
The ocean holds 25 quadrillion tons

That's the estimated weight of all dissolved minerals in Earth's oceans. Every cubic mile contains about 120 million tons of salt.

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Water.Day_Japanese woman boiling water for tea
The tea ceremony is actually about water

Japanese tea ceremony elevates heating water into a meditation on presence and perfection.