Freelance environmental journalist Sophie Yeo examines how the Earth would have looked before humans scrubbed at its diversity: landscapes shaped by megafauna, primeval forests that emerged following the last Ice Age, eagle-haunted skies of the Dark Ages and flower-decked farms of more recent centuries. Along the way, she encounters the environmental detectives – archaeological, cultural and ecological – reconstructing, in stunning detail, the landscapes we have lost, and finds out how they may point the way towards a wilder future.