A Extreme cold is one reliable way to keep artefacts relatively fresh for a few thousand years, but once thawed out, these materials experience degradation relatively swiftly.
B As the ice has vanished, it has been giving up the treasures it has preserved in cold storage for the last 6,000 years.
C Fieldwork is hard work - hiking with all our equipment, often camping on permafrost - but very rewarding.
Which section contains the following information? Choose the correct letter, A-C.