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A farmer in India piles millet in a field. Grains such as millet and sorghum pack a powerful nutritional punch, but they are overlooked for calorie-laden commodity crops such as wheat or maize. Sam Panthaky/AFP/Getty Images hide caption

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Sam Panthaky/AFP/Getty Images

Yellows, oranges and reds show regions where the average temperature from 2013 to 2017 was higher than a baseline average from 1951 to 1980, according to an analysis by NASA's Goddard Institute for Space Studies. NASA's Scientific Visualization Studio hide caption

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NASA's Scientific Visualization Studio

Corot 7b L. Calçada/ESO hide caption

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L. Calçada/ESO

Out Of This World: How Artists Imagine Planets Yet Unseen

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The Geologic History of Earth. Note the timescales. We are currently in the Holocene, which has been warm and moist and a great time to grow human civilization. But the activity of civilization is now pushing the planet into a new epoch which scientists call the Anthropocene. Ray Troll/Troll Art hide caption

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Ray Troll/Troll Art

An artist imagines what the surface of the planet Proxima b, orbiting the red dwarf star Proxima Centauri, might look like. M. Kornmesser/ESO/NASA hide caption

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M. Kornmesser/ESO/NASA

Why The Discovery Of An Earth-Like Planet Is Such A Big Deal

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Solar storms from the sun send charged particles streaming towards Mars. Research now shows those particles are stripping away the atmosphere. NASA/GSFC hide caption

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NASA/GSFC

Researchers Reveal How Climate Change Killed Mars

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New Mexico's largest electric provider — the coal-fired San Juan Generating Station near Farmington — has been defending a plan to replace part of an aging coal-fired power plant with a mix of more coal, natural gas, nuclear and solar power. Susan Montoya Bryan/AP hide caption

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Susan Montoya Bryan/AP

Climate Change Is Not Our Fault

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A view of a phytoplankton bloom near Alaska's Pribilof Islands. The milky green and light blue shading of the water indicates the presence of vast populations of microscopic phytoplankton. NASA hide caption

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NASA