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Halley stands on the Brunt ice shelf. This flows off the Antarctic continent
into the Weddell Sea at a rate of 2m per day, breaking off at the edge to
form giant icebergs. Temperatures rarely get above freezing in Summer and fall to -50 C in winter when there is 24 hour darkness for three months. For about 9 months of the year the 30 or so residents are completely isolated from the outside world by the surrounding sea ice and impossible flying conditions. Only a nearby colony of emperor penguins keeps them company.
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