Three people were evacuated from a US research base in Antarctica during a high-risk operation in round-the-clock darkness and sub-zero temperatures, according to authorities.

The Royal New Zealand Air Force conducted the perilous operation Tuesday afternoon after the United Nations Science Foundation requested a medical evaluation for three staff members at McMurdo Station, including one who needed urgent medical help, the RNZAF said in a statement Wednesday. 3

A crew aboard the C-130J Hercules braved total darkness and bone-chilling temperatures to reach the station overnight, authorities said.

Flights conducted in the continent’s mid-winter season, which is between March and October, are often the most dangerous due to varying weather conditions and on-ice landings, Air Compon

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