As our
own hominin lineage became both more social and more exploratory, the ability to see red would have provided a particularly useful advantage.
The find — the first made with genetic, not fossil evidence — suggests that Central Asia was occupied at that time not only by Neandertals and Homo sapiens but also by a third, previously
unknown hominin lineage.
Femoral head bones of different species illustrating the size range in
the hominin lineage.
«From then onwards, average body height and weight stays more or less the same in
the hominin lineage, leading ultimately to ourselves,» says Will.
«This suggests a shared, common ancestry for this trait before the split of these three
hominin lineages.»
A palaeontologist at the University of the Witwatersrand in Johannesburg, South Africa, he shot to scientific stardom in 2010 when he discovered Australopithecus sediba, one of the most remarkable fossils of
the hominin lineage known to date.
Fossil records show
our hominin lineage emerged before our brains began enlarging.
Whether H. floresiensis is correctly attributed to the genus Homo; if actually a member of an earlier member of
the hominin lineage, such as H. erectus; could Hobbit belong to A. afarensis and if so how did Honnit's ancestors get to Indonesia; these are all questions difficult to answer on the evidence currently available.
(See the story «Hobbit Symposium Held», below) Although given the genus name Homo, the fossils found a few years ago in Indonesia exhibit many traits, especially in the hands and feet, of much earlier members of
the hominin lineage, particularly Australopithecus afarensis, which lived three million years ago and is not thought to have migrated out of Africa.
«Our findings suggest that an innate predisposition, or intrinsic motivation, to manipulate objects was likely also selected for in
the hominin lineage and played a key role in the evolution of technology in our own lineage,» she said.