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Dusty Differences Between Mars and Earth
Both planets face dust storms—and the occasional flight delays that come with them.
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Fires Near Yosemite
For the second time in a month, drought-parched forests near the park are burning.
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Southern Nights with Lights
The aurora australis fluttered north and south of the Antarctic Circle on several nights in July.
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Mountain Shadows, Western Mongolia
Low Sun angles help reveal the three dimensions of a landscape.
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A Reservoir Runs Dry
A reservoir in northern Mexico drops to less than one percent capacity amid a persistent and deepening drought that defies borders.
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Lake Mead Keeps Dropping
Water levels are at their lowest since 1937.
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A Lake of Superior Cold
At least one place in the U.S. is colder than normal.
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