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Posts tagged h2o

March 28, 2012


child underwater holding breath

How Much Breathable Oxygen Gas Is There In The Atmosphere?

I have a friend who says there's not much oxygen on earth. Ever since I heard that I can't catch my breath! What's the truth?

December 8, 2011



Are You Chemically Dependent?

We humans are dependent on chemicals like water, air, sugars, starches, fats, proteins, as well as on small amounts of vitamins and minerals.

May 3, 2005


Water on the Sun

Is there water on the sun? Learn more on this Moment of Science.

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