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Fall colors sweep across the Scottish Highlands.
Blood Falls bursts out of a massive glacier in Antarctica, the result of extremophile microorganisms living a lightless existence below the ice, changing the chemistry of water as it seeps at the surface.
An iconic temple complex at Angkor Wat, Cambodia.
Clouds envelop a mountain in eastern Java.
A researcher walks among Adelie penguins in Antarctica.
Graffiti adorns Melbourne like tattooes cover the arms of a hipster.
A sundog throws a spotlight on Amundsen-Scott South Pole Station and the geographic south pole.
Scientists scout out the barren Dry Valleys while doing fieldwork in Antarctica.
People in the Dry Valleys
Scientists scout out the barren Dry Valleys while doing fieldwork in Antarctica.