A team of British scientists are due to begin drilling into an ancient lake buried under 3 kilometres of Antarctic ice.
This will be the first attempt to extract uncontaminated samples of water and sediment from a body of water so far below the surface.
The team will drill the ice with a special hot-water drill, that will use approximately a thousand litres of water made from melted snow. It will take the team around five days to reach the subglacial lake.
Video thanks to Pete Bucktrout from the British Antarctic Survey.