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By: sergio rigolino

the surface still looks kinda green, is the water of living beings inside this ball?

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By: zkank

Water molecules are also split during photosynthesis.I remember hearing as a kid a common misconception years ago, that we are drinking the same water that had once been urine in dinosaurs (Wowwww…!...

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By: rama

Whether we feel thirsty or wet, better to conserve our water resources NOW!!

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By: Beun

Reminds me of a post from 2010, which has an image with two water spheres instead of one. One is salt water, one is fresh water. The fresh water sphere is just a dot. Shows even better how little fresh...

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By: Albion Bowers

JM, I thought almost the exact same question this morning. So computing the size of a ball of atmosphere (all of it, at sea level pressure and density) comes out to 2087.86 km diam (1296.56 mi). That’s...

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By: Olaf2

Water resources are going no where, all you need to do it is purify it again.

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By: Eppur_si_muove

Are you saying that before we called our planet Earth, or Terra, we started out calling it “Dirt”? …Could you elaborate, how do you know this.

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By: Torbjörn Larsson

Just joking.Eppur scherza.

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By: Torbjörn Larsson

It is a water cycle, so what organisms or photolysis breaks down is reconstituted.For an estimate, let us forget photolysis for laziness. Most of the water we produce is from metabolism, the oxygen...

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By: Alanator

Who`s to say we won`t get hit by an asteroid next week, which replenishes all the water, but you can`t enjoy it for another 50 million years! (:

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By: Daddy Bud

In reply to Joe Cazana. Atmosphere is very thin and is included in this measurement…as is ice and all other forms of water…its foolish to worry as its going to be the one thing that will limt the...

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By: Daddy Bud

In reply to <a href="https://www.universetoday.com/95054/earth-has-less-water-than-you-think/#comment-116612">Fons Jena</a>. they are developing a machine satalite that will go up and bring...

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