A complex farming society developed in Uruguay around 4,800 to 4,200 years ago, much earlier that previously thought, Iriarte and his colleagues report in this weeks Nature (December 2). Researchers had assumed that the large rivers system called the La Plata Basin was inhabited by simple groups of hunters and gatherers for much of the pre-Hispanic era.
Iriarte and coauthors excavated an extensive mound complex, called Los Ajos, in the wetlands of southeastern Uruguay. They found evidence of a circular community of households arranged around a central public plaza. Paleobotanical analyses of preserved starch grains and phytoliths –tiny plant fossils- show that Los Ajos farmers adopted the earliest cultivars known in southern South America, including maize, squash, beans and tubers.
Over time, around 3,000 years ago, the mound complex architectural plan of Los Ajos exhibited sophisticated levels of engineering, planning, and cooperation revealing an earlier, new, and independent architectural tradition previously unknown from this region of southern South America. The formal and compact layout of the central part of the site (Inner Precinct) consists of seven imposing platform mounds surrounding a central plaza area.
José Iriarte | EurekAlert!
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07.03.2017 | International Institute for Applied Systems Analysis (IIASA)
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
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