UFO Discovered In Antarctica?

Is this evidence that aliens have landed on Earth? Or just a black mark on a satellite image? Whatever the image is showing, many people have interpreted it as a crashed UFO as they continue to search evidence to back up claims about alien life coming into contact with the Earth.
Valetin Degterev, the researcher of the unknown, said it could be the proof that extraterrestrials have landed on Earth. Posting to social media, the Russian expert said he noticed the black mark in Antarctica through looking at Google Earth.
He claimed that it shows an unidentified flying object in the ice after crash landing three years ago. Mr. Degterev said that it’s the most genuine, classic shape UFO in the endless ice desert.
Apparently ignoring the fact that there are many other cliff formations and shadows in the area, Mr. Degterev said the UFO measured around 65ft by 230 ft. He believes it’s something that could not be explained by anything natural to the planet.
Degterev added that there could be a gigantic disc-shaped flying machine in the ice.
He is confident that the image wasn’t a polar station, a plane, or a ship. He said that it appears this is an object made from the distant cosmos.
Author of the UFO Investigations Manual, Nigel Watson, said that it was difficult to tell exactly what the photo showed, claiming the spot had a long tradition of extraterrestrial spacecraft landings.
Meanwhile, Antarctic experts said that it was a crevasse.