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supplies being moved in. the drilling site is not an easy place to work. as well as being —35 degrees, that's in summer, it's also more than 3000 meters above sea level. this is what they're after. this ice sample was from an earlier drilling mission back in 2008. that recovered material from as far back as 800,000 years ago. the new mission plans to beat that. amy king is from the british antarctic survey, who are part of the project. great to have you on the programme. thanks very much for your time. when you make your list of goals for what you make your list of goals for what you were hoping to learn, what is right at the top was my to put some of this in context if we think about how ice is formed on the ice sheet... how ice is formed on the ice sheet- - -_ how ice is formed on the ice sheet... . , . sheet... year upon year layer upon la er of sheet... year upon year layer upon layer of the — sheet... year upon year layer upon layer of the fall _ sheet... year upon year layer upon layer of the fall line _ sheet... year upon year layer upon layer of the fall line one _ sheet... year upon year layer upon layer of the fall line one a - sheet. .. year upon year layer upon layer of the fall line one a layer- layer of the fall line one a layer on top of the other so older at the top and younger. when snow falls in capital air bubbles from the time the snow fell. this is a unique record. it is a direct sample of the atmosphere from the time that that snow fell. and we are aiming to