All of these photographs are so beautiful, I highly recommend looking at all of them over at the Atlantic. Here are a few selects (click to see larger versions):

The aurora australis provides a dramatic backdrop to a Scott Tent at Amundsen-Scott South Pole Station on July 14, 2009. (National Science Foundation/Patrick Cullis)

The Matusevich Glacier flows toward the coast of East Antarctica, pushing through a channel between the Lazarev Mountains and the northwestern tip of the Wilson Hills. Each of the smaller blocks measure nearly one kilometer across. After passing through the channel, the glacier has room to spread out as it floats on the ocean. On September 6, 2010, the Advanced Land Imager (ALI) on NASA’s Earth Observing-1 (EO-1) satellite captured this natural-color image. (NASA Earth Observatory/Jesse Allen and Robert Simmon)

Inside an ice cave near Ross Island on November 25, 2008. (National Science Foundation/Robyn Waserman)

Long Term Ecological Research (LTER) field team member Anna Bramucci throws hot water into the air to watch it turn to ice crystals and vapor on a -25 F (-32 C) day at Lake Fryxell field camp in Taylor Valley, Victoria Land on March 30, 2008. (National Science Foundation/Chris Kannen)

Adelie penguins along the ice edge in the Ross Sea, seen on January 12, 2010. (National Science Foundation/Robyn Waserman)