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Use the moon and Jupiter to find the planets Mars and Mercury closer to the horizon. The moon and Jupiter rise in the predawn darkness, but Mercury won’t rise till after dawn’s first light.
Matt Daniel's WeatherGlobe
U.S. snow and ice in 2013 compared to 2012
Blogus scientificus by Alex Reshanov
Humans aren't top predators, says new report
Earth Trekker by Deanna Conners
Early warning system for abrupt climate impacts