When and why feathers first appeared on the earth is just one puzzle scientists hope to solve by studying the area where the fossils were found.

科学家们通过研究发现这些化石的地方，希望能找到羽毛最早什么时候和为什么在地球上出现这个谜题的答案。

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By studying the core's rocks and fossils, the team has been learning about the past temperature and behaviour of Antarctica's massive ice sheets.

ECONOMIST: The South Pole as location and metaphor