East Anglian Fens were covered in yew trees 4,000 years ago, study finds

Bog oak' study finds more than 400 well preserved yews, which could help solve mystery of historic rapid sea level rise

The flat landscape of the East Anglian Fens is known for its vast arable fields and absence of trees. But just over 4,000 years ago, these lowlands were dominated by dense woods of ancient yew trees.

A study of hundreds of tree trunks inadvertently dug up by fenland farmers has found that this woodland abruptly disappeared 4,200 years ago, probably because a rapid rise in the North Sea flooded the low-lying region with saltwater.