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The prize fossil found alongside Scott's body was the plant Glossopteris indica, an extinct beech-like tree from 250 million years ago.
On the return journey from the South Pole, they stopped to explore a moraine under Mount Buckley (pictured top of this page).
This was no random detour. Running low on food and struggling against foul weather, the explorer-scientists had a specific goal in mind.
A newly-minted theory held that Antarctica had once been part of an ancient super-continent named Gondwanaland (now Gondwana), and had once had a climate mild enough to support trees.
http://www.bbc.co.uk/news/magazine-15384729