Lake Ellsworth Ice Mission Q&A
Updated: 7:42am UK, Saturday 08 December 2012
As the scientists prepare to start drilling, Sky's Thomas Moore answers the key questions about the project.
Where is Lake Ellsworth?
The lake is under the West Antarctic ice sheet, 70km west of the Ellsworth Mountains.
Seismic studies suggest it is approximately 150m deep and is roughly the same size as Windermere.
There are over 360 sub-glacial lakes known to exist below Antarctica's vast ice sheet.
How remote is it?
The team has travelled 16,000km to reach Lake Ellsworth, flying first to the southern tip of Chile and then on to the drilling site in a smaller aircraft that is able to land on ice. In all, the flight time was five days.
Equipment was air-freighted to a runway on the Union Glacier and then hauled by tractor train 280km through the Ellsworth mountain range.
What are living conditions like?
The team will spend six weeks at the camp. Outside the wind-chill can dip to minus 70 degrees Celsius.
They will sleep in four-man clam tents. In the 24-hour daylight of the Antarctic summer, temperatures inside are generally between four and 20 degrees.
A larger tent serves as a kitchen, dining area and office.
A chef provides freshly-cooked food - even bread.
How will the engineers drill through the ice?
The team had to design a sophisticated hot-water drilling rig that could bore through the ice without contaminating the pristine waters of the lake.
Around 90,000 litres of water will be heated to 90 degrees Celsius by a 1.5 MW boiler and pumped at high pressure through a 3.2km continuous hose that has been made to support its own weight and the heavy drill head.
The drill should melt a 36cm borehole through the 3km of ice in around 100 hours.
Once drilling starts there is no turning back - the water in the hose would quickly freeze.
And then?
Once they breakthrough into the lake, scientists will drop down a titanium probe to sample the water at various depths. Built by the National Oceanography Centre in Southampton, it contains 3,000 individual components.
Then they will use a highly specialised sediment corer to take a 3m column of the lake-bed.
The equipment has been sterilised to space-industry standards using hydrogen peroxide vapour to prevent surface microbes contaminating the lake.
All this has to be done within 24 hours or the borehole will be too narrow to retrieve the samples
Won't the scientists risk a geyser when they drill through to the lake?
Millions of tonnes of ice are pressing down on the lake. But the engineers have a plan to stop the water bursting back up to the surface when they breakthrough.
The first borehole will stop at 300m, where they will create a cavity. A second borehole will go through the cavity down to the lake. The cavity controls the pressure of the water.
What if they don't find life?
The scientists say that, too, would be significant. It would show there is a limit at which no life can exist on our planet.
But they are confident they will find microbes - wherever else there is water on Earth there is life.
And that would encourage scientists who believe there may be life in the seas below the icy crust of Jupiter's moon Europa.
Police vans cut off part of Belfast's Sandy Row area
A burned out car in Belfast city centre after rioters dispersed
Hillary Clinton appealed for the violence to stop
Union boss Mark Serwotka says Starbucks' tax stance is "scandalous"
Margaret Hodge branded the bidding process a "fiasco".
Bob Crow says the bid debacle could eventually cost £100m
Education Secretary Michael Gove
Mike Hamilton served in the Royal Engineers for eight years
Armagh's Mayor Sharon Haughey, then 14, with President Clinton in 1995
Mrs Clinton has already visited Dublin and met children at the US embassy
Motorists are warned to be careful on the icy roads
Passengers' patience wore thin at Stansted
The Baitul Futuh mosque in Morden, south London
William and Kate leaving the hospital earlier
The Beech Hill crossing after the crash
Girl's death has left parents 'shocked and devastated'
Prince William visits his wife on her third day in hospital
Two female officers were taken to hospital
Loyalist protestors carrying Union flags block the back of City Hall
The Union flag will now be flown on 17 designated days 
EastEnder Rita Simons speaks out in the latest edition of Hello! magazine
Frozen flood water at York Racecourse, North Yorkshire, on Sunday
Many areas are likely to see about 3cm of snow
Starbucks operates more than 700 stores in the UK
The three leading US companies and their corporate tax rates