(Colin O'Brady via AP) In this photo provided by Colin O'Brady, of Portland., Ore., he poses for a photo while traveling across Antarctica on Wednesday, Dec. 26, 2018. He has become the first person to traverse Antarctica alone without any assistance. O'Brady finished the 932-mile (1,500-kilometer) journey across the continent in 54 days, lugging his supplies on a sled as he skied in bone-chilling temperatures.
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