Russia: Researchers in Russia are investigating a giant mysterious hole that has appeared in one of Russia's most isolated northernmost regions.
It is still unclear what may have caused the huge crater, about 100 meters in diameter, filmed from the air in Yamal, which means 'the end of the Earth' in the local Nenets language. The area is known to have temperatures plummet to -50 degrees Celcius and the sun barely rises in winter.