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44 trillion watts of heat continually flow from Earth's interior into space. Where does it come from?

Researchers can say with 97 percent certainly that 50 percent of the heat is due to radioactive decay and other sources, like primordial heat left over from the planet's formation, must account for the rest.

Knowing that radioactive decay of uranium, thorium, and potassium in Earth's crust and mantle is a principal source, in 2005 scientists in the Kamioka Liquid-scintillator Antineutrino Detector (KamLAND) collaboration first showed that there was a way to measure the contribution directly.
Rice accounts for nearly half the daily calories for the world's population but crops are at risk from tsunamis and tidal surges and perhaps future unknown effects of climate change.  

But naturally occurring fungi called endophytes might come to the rescue. 

In an effort to explore ways to increase the adaptability of rice to disasters that have already led to rice shortages, USGS researchers and their colleagues colonized two commercial varieties of rice with the spores of fungi that exist naturally within native coastal (salt-tolerant) and geothermal (heat-tolerant) plants. 
An unusual number of destructive storm surges along the East Coast during the 2009-2010 El Niño winter could be a taste of things to come - with more destructive storm surges in future El Niño years, according to a new study by NOAA.

El Niño conditions are characterized by unusually warm ocean temperatures in the Equatorial Pacific that normally peak during the Northern Hemisphere 'cool season.' They occur every three to five years with stronger events generally occurring every 10-15 years. El Niño conditions have important consequences for global weather patterns, and within the U.S., often cause wetter-than-average conditions and cooler-than-normal temperatures across much of the South.
New research on Jakobshavn Isbrae, a tongue of ice extending out to sea from Greenland's west coast, shows that large, marine-calving glaciers don't just shrink rapidly in response to global warming, they also grow at a remarkable pace during periods of global cooling.  Glaciers change.

Through an analysis of adjacent lake sediments and plant fossils, the researchers determined that the glacier, which retreated about 40 kilometers inland between 1850 and 2010, expanded outward at a similar pace about 200 years ago, during a time of cooler temperatures known as the Little Ice Age.
Trees absorb carbon dioxide from the atmosphere as they grow so forests are a completely natural way to offset climate change - but rather than let them passively sit there, the amount of carbon dioxide they extract from the atmosphere could be boosted by 400 percent if wood was harvested and used in smaller buildings instead of the steel and concrete that require a lot more fossil fuels during manufacturing, producing carbon dioxide.