Nations including the US, China, Russia, India and Japan are rushing to explore the Moon's surface, with some planning permanent human settlements.
But it's another area that needs a lot of work, says Pierce.
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Most accidents that occur during climbing are down to "poor planning", says Matt Cooper, a mountain rescue team member in Wales and founder of the Mountaineering Company. This includes not having suitable clothing and equipment, like crampons and an ice axe, not checking and fully understanding the weather forecast, like which wind speeds are too strong, and not navigating properly, he says.