Posted on Sunday, 14 August, 2011 | 10 comments| News tip by: Still Waters
Image credit: sxc.hu
The ancient wood belonged to a small herb and would have grown over 400 million years ago.
The discovery suggests that wood didn't originally evolve in trees - instead it is believed that it assisted in the flow of water up the stems of the plants. Trees didn't appear until around 385 million years ago.
Two 400-million-year-old fossil plants are the oldest known examples of wood. They are small herbs, suggesting that wood did not evolve to help plants grow tall.