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For decades, researchers around the world have searched for ways to use solar power to generate the key reaction for producing hydrogen as a clean energy source — splitting water molecules to form hydrogen and oxygen. 

The carbon cycle, the process through which carbon moves between rocks, oceans, living organisms and the atmosphere, acts as Earth’s natural thermostat, regulating its temperature over long time periods.

What’s a hungry marine microbe to do when the pickings are slim? 

Just weeks after the Pacific Northwest endured record-shattering temperatures, another heat wave scorched the U.S. Southwest.

Three successive thunderstorms formed in the Arctic last week, a rare phenomenon in the frigid north, but one that is likely to become more common as the planet warms, Reuters reported.