The Moon today is barren, inhospitable and lifeless. It has no atmosphere, no magnetic field to block harmful space particles, none of the complex chemistry necessary for life to emerge, and to top everything off, it experiences wild variations in temperature.
However, there may have been two periods billions of years ago when conditions on the lunar surface were sufficient to support simple lifeforms, according to a study published in the journalAstrobiology.
In the paper, researchers from Washington State University (WSU) and the University of London suggest these two periods may have occurred around 4 billion years ago, soon after the Moon's formation, and then again around 3.5 billion years ago, when the Earth’s only natural satellite was at the peak of its volcanic activity.
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