There's a really weird-looking hole on the moon and no one knows why - Metro.co.uk

There's a really weird-looking hole on the moon and no one knows why Metro.co.ukNASA mission seeks to confirm existence of lunar lava tube Aerospace AmericaThere's A Suspicious-Looking Hole On The Moon, And NASA's Going To Investigate It With A Surface Mission IFLScienceNASA plans mission to explore suspicious deep hole on the Moon geekspin