Clearing -- or perhaps roiling -- the murky and often contentious waters of Mesoamerican archeology, a study of 3,000-year-old pottery provides new evidence that the Olmec may not have been the mother culture after all.
Writing this week (Aug. 1, 2005) in the Proceedings of the National Academy of Sciences (PNAS), a team of scientists led by University of Wisconsin-Madison archeologist James B. Stoltman presents new evidence that shows the Olmec, widely regarded as the creators of the first civilization in Mesoamerica, imported pottery from other nearby cultures. The finding undermines the view that the Olmec capitol of San Lorenzo near the Gulf of Mexico was the sole source of the iconographic pottery produced by the earliest Mesoamerican civilizations.
"At issue here is trade pottery," says Stoltman, an emeritus professor of anthropology and an archeologist more familiar with the ancient native cultures of the Southeastern and Midwestern United States.
James B. Stoltman | EurekAlert!
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Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
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Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
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A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
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