Scientists have been baffled by the discovery of a 260ft-wide hole in the ground in north Siberia. It has the appearance of an 80m wide crater at the edges, but continues down into an underground chamber of unknown depth.
The sides of the crater are said to be fresh earth, which experts say indicates that it was created in the last few years, according to the Siberian Times. A team of experts were launching an expedition to the site on Wednesday.
It was found by engineers who were flying past in a helicopter and filmed it, posting the footage on YouTube. Its discovery on Russia’s Yamal peninsula has prompted several theories as to how such a large hole could come to exist in such a remote place.
Theories have been fuelled by the name of the location it was found. Yamal means “end of the world” in the local language. Experts say the most likely explanation is that it was created by an explosion of gas that had built up in a naturally occurring chamber under the surface.