10:06The ForumTracing the roots of ancient treesBBC World Service Duration: 40 minutes Thu 1st Jul 2021, 10:06 on BBC World Service West and Central AfricaAvailable for over a yearListen nowWhat are the origins of trees, and what can we learn from the oldest species? Show more GenresFactualArts, Culture & the MediaFormatsDocumentariesBrandThe Forum Source: BBC Online