https://motherboard.vice.com/en_us/article/j5n5v8/life-on-the-moon-study

The Moon hangs above us like a dusty old rock, devoid of life, pock-marked by craters. As static and unchanging as it seems to us now, the Moon may have looked quite different four billion years ago, in its earliest years, according to a new study that suggests the surface may have held life.

A new study published in Astrobiology, led by Dirk Schulze-Makuch, an astrobiologist at Washington State University, and Ian Crawford, a professor of planetary science and astrobiology at the University of London, says there were times in the Moon’s early days when conditions were right for simple lifeforms.