It suggests that human evolution is much more complicated than the simple tree diagram often used to describe it. Researchers found that the two populations split 1.5 million years ago ...

These diagrams don't ... as speech is a uniquely human trait). Thus, understanding the evolutionary history of living species amounts to understanding where on the tree of life these species ...

And, while other branches of the human evolutionary tree are vigorously debated in ... Cladogram: a branching diagram that represents only phylogenetic relationships among organisms (i.e., it ...