Ice forms on a Christmas-themed sculpture in the Museum of the History of Permafrost Studies located beneath the main building of the Melnikov Permafrost Institute in the eastern Siberian city of Yakutsk in Russia on November 26, 2018. (Photo/Agencies)
An electronic thermometer shows the temperature in the Museum of the History of Permafrost Studies located beneath the Melnikov Permafrost Institute in the eastern Siberian city of Yakutsk in Russia on November 26, 2018. (Photo/Agencies)
Rozalia Ivanova, administrator of the Museum of the History of Permafrost Studies, checks the thermometer in a gallery beneath the Melnikov Permafrost Institute in the eastern Siberian city of Yakutsk in Russia on November 26, 2018. (Photo/Agencies)
A scientist works with permafrost samples in an underground laboratory of the Melnikov Permafrost Institute in the eastern Siberian city of Yakutsk in Russia on November 26, 2018. (Photo/Agencies)
