An ufologist, registered on YouTube under the name Streetcap1, discovered an unusual formation in photographs from the surface of Mars, submitted by NASA space agency from the Opportunity rover on May 15, 2016 (see video below).
A massive black formation rises on the hill. It stands out noticeably in its shape and structure from the scattered small stone fragments on the surface of the hill. In all likelihood, the famous ufologist Scott K. Waring believes, it appeared here quite recently. In his opinion, this structure resembles an igloo - a hemispherical dwelling, which the Eskimos build from snow, only black.
“This igloo-like house on the hill really resembles the ice structures here on Earth,” commented Scott Waring. “There seems to be a tunnel entrance on the right side. But it's so black it's hard to make out for sure."
“It is very strange to see something whole and intact among the destroyed and split into several parts of the rocks. It looks like this is a newer structure,”added the ufologist.
The original photos from the Opportunity rover can be seen at the link: