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Go deeper: Finding the coldest temperature on Earth

1911: Norwegian explorer Captain Roald Amundsen, the first man to reach the South Pole, inspecting ice fields near a glacier in the Atlantic Ocean.
Norwegian explorer Captain Roald Amundsen, the first man to reach the South Pole, inspecting ice fields in 1911. Photo: Keystone/Getty Images

In 2013, scientists announced that they had observed the coldest temperature on Earth near the South Pole at -135°F, but a new study re-analyzing that data found the temperature was really -144°F.

The big picture: Researchers scanning dips and hollows in the Antarctic ice sheet found that, over the last 14 years, there were many places where temperatures dropped to exactly -144°F but never colder, prompting them to postulate that this is the lowest possible temperature on Earth's surface.