Geologist and climatologist Gina Moseley led a team of cavers into an unknown system of limestone caverns in northern Greenland in the summer of 2015. Her findings will keep her busy for a long time to come. She describes what it was like wriggling into these remote spaces, knowing they were the first people to have ever done so. This in a place where the rest of the world's population of 7.3 billion people lives well south of their northern latitude.

The wonder of being there contrasts with the work that lies ahead of her, to analyse the flowstone in the caves they came to sample, and to find out what it tells us of previous times when the earth's climate warmed up, just as it's doing again now.