These fossil species between 8 million and 4.4 million years old include some of the earliest members of the hominin lineage.
A news story by Ewen Callaway investigates the mysterious case of this purported earliest bipedal hominin.
A review of work published in 2017 describing fossil material of Graecopithecus freybergi from Greece and Bulgaria.
A big argument about the so-called savanna theory comes with a surprising claim about the earliest possible hominin fossils.
I recount the complicated story of how a discoverer of the Toumaï skull has raised doubts about its context.