Charles Darwin's tree of life, which shows how species are related, is " wrong" and "misleading", claim scientists. They believe the concept misleads us because his theory limits and even obscures the study of organisms and their ancestries. Evolution is far too complex to be explained by a few roots and branches, they claim. Many of their species swap genes back and forth, or engage in gene duplication, recombination, gene loss or gene transfers from multiple sources. Dr John Dupré, a philosopher of biology at Exeter University, said: "If there is a tree of life it's a small irregular structure...