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Tundra shrubs turning into trees as Arctic warms

Last Updated: Monday, June 04, 2012, 14:05

Tundra is a cold, treeless region in the Arctic where tree growth is stunted by harsh weather.

Wood may be 10 million years older than thought!

Last Updated: Wednesday, August 17, 2011, 16:48

A study of 400-million-year-old samples of fossils has revealed that woody plants appeared about 10 million years earlier than previously thought.