Humankind is a continuous experiment
Putting God’s hand aside as one must as a scientist, human beings are an experiment in adaptation (like all living beings). Things change and we change with it. We try some things, sometimes they work and sometimes not. Humans evolved by taking what works and discarding what doesn’t, i.e. survival of the fittest.
“Species as experiments in evolution
It makes sense that there seem to have been many variations in anatomical form evolving around 2 million years ago, said Lee Berger, paleoanthropologist at the University of the Witwatersrand in Johannesburg, South Africa, who led the discovery of the fossils.
"As you’re beginning to have the stresses and stressors of environmental change and the things going on in Africa around 2 million years (ago), you would think that many experiments would emerge, Sediba just being one of those," he said.”
Paleontologists discovered some new bones and are making something of it. They want to recast the stem of the history of human evolution. That’s OK by me. With all new discoveries, the information fits into a puzzle. The trouble, we don’t know how the picture is supposed appear. We just have to go with the pieces as we find them and make something of it.