A leading theory for the formation of the moon is that a planet called Theia smashed into the early Earth, but doubts remain. Now a new analysis of lunar rock supports this idea
Source:
https://www.newscientist.com/article/2236797-oxygen-in-lunar-rocks-suggests-the-moon-formed-in-huge-collision/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home