An unusually round and symmetrical deposit on Mars may be the result of an impact that popped the surface of the planet, causing a volcanic eruption less than 200,000 years ago
Read More
https://www.newscientist.com/article/2239910-an-asteroid-strike-may-have-popped-the-surface-of-mars/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home
