The find came from Sangiran expeditions conducted from 1998 through 2008 and co-led by UI Professor Russell L. Ciochon (sha-HAWN) and ITB Professor Yahdi Zaim (zye-EEM). In 2001, UI Associate Professor of Geoscience E. Arthur Bettis III joined the team to study the stratigraphy, sedimentology and soils in order to reliably date the Sangiran site.
The upper jawbone (fossil maxilla) was discovered as the team studied the geology and dating of the Sangiran lower fossil beds. The new fossil is the first Java specimen found in beds under direct geological study, making its provenance incontrovertible. The UI-ITB team has published several peer-reviewed papers dating the Sangiran lower beds to 1.5 million years ago.
Ciochon notes that the new fossil teeth contained within the jawbone show similarities to Homo erectus teeth found in East Africa and Western Eurasia. They are less like those of China's "Peking Man" -- Homo erectus teeth found in Northeast Asia.
Ciochon said that East Asia's two Homo erectus groups (Java and China) may have had separate geographic origins.
"Our team's find at Sangiran is one of several recently discovered human fossils, such as the so-called 'Hobbit' -- an island-dwarfed species of early human -- of the Indonesian island of Flores, as well as the discovery of a unique ancient human DNA lineage at a site in Siberia called Denisova, that has put East Asia in the scientific spotlight," Ciochon said.
"We are now gaining a greater appreciation for the complexity of human evolution in the region, and our research at Sangiran provides yet another line of evidence in an ever-growing mass of data that will help shed light on this faintly illuminated region in our distant human past," he said.
Ciochon is a professor in the UI Department of Anthropology in the College of Liberal Arts and Sciences (CLAS). Other CLAS co-authors are Associate Professor Robert Franciscus and graduate students K. Lindsay Eaves and Hannah Marsh. ITB co-authors are Yan Rizal and Aswan. Other co-authors are Assistant Professor Joshua Polanski, Department of Anthropology, University of Arkansas (2010 CLAS Ph.D. graduate); Professor Frederick Grine, Departments of Anthropology and Anatomical Sciences, Stony Brook University, N.Y.; Roy Larick, Helios Laser, Cleveland, Ohio; and Matthew Heizler, New Mexico Bureau of Mines and Mineral Resources, Socorro, N.M.
The project was funded by the L.S.B. Leakey Foundation and the following UI sources: Center for Global and Regional Environmental Research; Central Investment Fund for Research Enhancement in the Office of the Vice-President for Research; Collaborative Interdisciplinary Projects Initiative in the Office of the Vice President for Research; Office of the Dean, CLAS; and the Human Evolution Research Fund at the University of Iowa Foundation.
STORY SOURCE: University of Iowa News Services, 300 Plaza Centre One, Suite 371, Iowa City, Iowa 52242-2500
MEDIA CONTACTS: Russell Ciochon, UI Department of Anthropology, email@example.com, 319-335-0522; Gary Galluzzo, UI News Services, 319-384-0009, firstname.lastname@example.org
Russell Ciochon | Newswise Science News
Modeling magma to find copper
13.01.2017 | Université de Genève
What makes erionite carcinogenic?
13.01.2017 | Friedrich-Schiller-Universität Jena
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).
Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...
Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.
The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...
UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration
"Traffic and weather, together on the hour!" blasts your local radio station, while your smartphone knows the weather halfway across the world. A network of...
Fiber-reinforced plastics (FRP) are frequently used in the aeronautic and automobile industry. However, the repair of workpieces made of these composite materials is often less profitable than exchanging the part. In order to increase the lifetime of FRP parts and to make them more eco-efficient, the Laser Zentrum Hannover e.V. (LZH) and the Apodius GmbH want to combine a new measuring device for fiber layer orientation with an innovative laser-based repair process.
Defects in FRP pieces may be production or operation-related. Whether or not repair is cost-effective depends on the geometry of the defective area, the tools...
10.01.2017 | Event News
09.01.2017 | Event News
05.01.2017 | Event News
16.01.2017 | Power and Electrical Engineering
16.01.2017 | Information Technology
16.01.2017 | Power and Electrical Engineering