sentences:  Petter Hellström has demonstrated that Darwin consciously chose to name his tree after the biblical tree of life, as described in Genesis, thus relating his theory to Christian mythology, and suggesting that he did so to mobilise the imagination of his readers.Ernst Haeckel (1834–1919) constructed several trees of life.His first sketch (in the 1860s) of his famous tree of life shows ""Pithecanthropus alalus"" as the ancestor of "Homo sapiens".