Satellites reveal risk of volatile fire season
Single-day CO2 tops 400 ppm
Thermal sensor lights up from volcano's heat
A truss design devised to help workers process space shuttles continues to find new uses as a space shuttle engineer-turned-entrepreneur adapts it to everything from a solar-powered electric generator to a mobile cell phone tower.
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The last time that carbon dioxide (CO2) levels were as high as they are today, mastodons still walked the Earth.
