Oxygen
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Oxygen Level Suitable For Explosion Of Animal Life On Earth Took 100 Million Years To Build Up
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Cancer Breakthrough: New Oxygen Test Can Spot Most Dangerous Tumors Before They Spread
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Ocean 'Dead Zones' Linked To Past Warming, Study Finds
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Rosetta Scientists Find Oxygen On Comet 67P: How This Gas Came To Be Formed On The Space Rock
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New Evidence Suggests Oxygen-Producing Life Forms Appeared Much Earlier Than Previous Estimates
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Here's Why You Need To Send Big Thanks To The Tiny Plankton: Half Of The Oxygen You Breathe
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Need Oxygen On Mars? Get It From Bacteria!
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When Did Water Start To Exist In The Universe? Here's The Explanation Of Experts
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Scientists Develop Electrocatalysts That Could Aid Long-Term Space Exploration
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Why was animal evolution so delayed? Earth was low on oxygen
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Low oxygen level prolonged evolution of animals on Earth
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Oxygen formation in one new step: Study reveals secret of lifeless Earth
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