News tagged with oxygen

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Trade winds ventilate the tropical oceans

Long-term observations indicate that the oxygen minimum zones in the tropical oceans have expanded in recent decades. The reason is still unknown. Now scientists at the GEOMAR Helmholtz Centre for Ocean Research ...

Dec 19, 2014
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How photosynthesis changed the planet

Two and a half billion years ago, single-celled organisms called cyanobacteria harnessed sunlight to split water molecules, producing energy to power their cells and releasing oxygen into an atmosphere that ...

Nov 20, 2014
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Study helps prevent rhino deaths during relocation

Wildlife experts lose one to two black rhinoceros each year from anesthesia complications when they capture and relocate the animals. That's 1 to 2 percent of the black rhinos that are moved annually, but ...

Aug 15, 2014
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