Science Mar 06

Without these ancient cells, you wouldn’t be here

Without the "billion billion billion" Prochlorococcus, a plant-like bacteria in the ocean, Earth would not have the oxygen we breathe today. But the more scientists study about these diverse organisms, the less they know, says Penny Chisholm, an oceanographer at…

Science Aug 01

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Greenland Residents Detect Sea Changes

Residents of Greenland's west coast say they are feeling the effects of rising sea temperatures in the fishing and tourism industries. NewsHour correspondent Spencer Michels reports on the research into whether the changes are climate change-related.