oxygen

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Troubled waters for ocean 'dead zones'

November 1, 2006 newsmaker Robert Diaz, a leading marine scientist working with the U.N., explains the increasing phenomenon of lifeless habitats. TAGS: oxygen, zone, U.N., water, ocean, Gulf of Mexico, food

NASA tests next-generation space capsules

March 8, 2006 Researchers at NASA Ames are putting crew exploration vehicles through their paces to see how they'll fare under pressure. Photos: Space capsules under pressure TAGS: paint, tunnel, wind, oxygen, scientist

Bacteria froze the Earth, researchers say

August 3, 2005 A deep freeze 2.3 billion years ago may have been caused by bacteria, an insight opening up debate on how climate change operates. TAGS: bacteria, oxygen, carbon, rock, freeze, planet, temperature, researcher, professor

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