One-million-year-old skull found recently in Ethiopia.
© Nature/ Bill Atlanta
This "terrific find" seems to complicate the story of human evolution.
© D.L. Bill/ Bill Atlanta
Ethiopian fossil suggests early humans were one big family.
A one-million-year-old skull unearthed in Ethiopia hints that our long-extinct cousins Homo erectus were a varied and widespread bunch, much like today’s humans. The find may undermine previous claims that H. erectus was in fact made up of two different species.
Homo erectus, which means ’upright man’, appeared about 1.8 million years ago. Because of its posture and large brain, it is regarded as the first fully human group. H. erectus left Africa and spread throughout Eurasia from eastern China, possibly reaching as far as southern England.
Bony-browed and thick-jawed, H. erectus wielded primitive stone tools and may have been the first creature to make and use fire.
Since the 1980s, however, some scientists have suggested that 1.7-million-year-old H. erectus fossils from Africa and central Asia are so different to later 700,000-year-old examples that they belong to a different species, Homo ergaster.
The latest find could turn that theory on its head.
The fossil is in remarkably good shape considering it is a million years old, says Berhane Asfaw of the University of Addis Ababa in Ethiopia, one of the team that found the skull near the village of Bouri, 230 km northeast of Addis Ababa, in 1997. "It’s a complete skull cap with all the important features present," Asfaw says.
The shape of the skull aligns it firmly with the recent H. erectus, but it shares some characteristics with older ones, says Asfaw. Its age also puts it right between where H. erectus and H. ergaster might have split. "Our fossil clearly links Asian and African forms of H. erectus," says Asfaw1.
Unless something else turns up, the find strongly suggests that H. ergaster is a misnomer, Asfaw believes.
Alan Walker, who studies human evolution at Pennsylvania State University in University Park, agrees. "It is arbitrary to break up the lineage into and early ergaster and later erectus," he says.
But Bernard Wood of George Washington University in Washington, DC, who first proposed the H. ergaster as a distinct group, is holding on to his idea. "It’s a terrific find," he says and certainly relevant to H. erectus’ history. But he suspects the new find bears too little resemblance to H. ergaster to rule them out as a separate group.
Even if the skull does unify H. erectus as a group, it doesn’t simplify the picture of their history.
Finding a fossil in Ethiopia that looks like east Asian H. erectus suggests that anatomical features, such as skull shape, might have varied independently of location. Previously, the geographical separation of different forms of H. erectus fossils was thought to explain why they look the way they do.
TOM CLARKE | © Nature News Service
Fighting myocardial infarction with nanoparticle tandems
04.12.2017 | Rheinische Friedrich-Wilhelms-Universität Bonn
Virtual Reality for Bacteria
01.12.2017 | Institute of Science and Technology Austria
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...
An interdisciplinary group of researchers interfaced individual bacteria with a computer to build a hybrid bio-digital circuit - Study published in Nature Communications
Scientists at the Institute of Science and Technology Austria (IST Austria) have managed to control the behavior of individual bacteria by connecting them to a...
Physicists in the Laboratory for Attosecond Physics (run jointly by LMU Munich and the Max Planck Institute for Quantum Optics) have developed an attosecond electron microscope that allows them to visualize the dispersion of light in time and space, and observe the motions of electrons in atoms.
The most basic of all physical interactions in nature is that between light and matter. This interaction takes place in attosecond times (i.e. billionths of a...
Transistors based on carbon nanostructures: what sounds like a futuristic dream could be reality in just a few years' time. An international research team working with Empa has now succeeded in producing nanotransistors from graphene ribbons that are only a few atoms wide, as reported in the current issue of the trade journal "Nature Communications."
Graphene ribbons that are only a few atoms wide, so-called graphene nanoribbons, have special electrical properties that make them promising candidates for the...
08.12.2017 | Event News
07.12.2017 | Event News
05.12.2017 | Event News
08.12.2017 | Life Sciences
08.12.2017 | Information Technology
08.12.2017 | Information Technology