The US space agency, Nasa, has revealed conclusive evidence of water on the Moon.
Unlike previous detections of water in permanently shadowed parts of lunar craters, scientists have now detected the molecule in sunlit regions of the Moon's surface.
But what does this mean for future missions to the Moon? And beyond?
And what else is on the Moon?
BBC Science Correspondent Laura Foster explains.
Video by Laura Foster, Terry Saunders and Mattea Bubalo.