A publication of the Archaeological Institute of America. Ten feet below the waters of the Midway Atoll are the remains of a broken, infamous, slightly stubby piece of aviation history. A rock collection represents the earliest known evidence for shamanistic practices in lower Central America. Between 4, and 4, years old, the group of 12 small pieces of crystal and other stones were found in the back of a rock shelter. Several show abrasions and other signs of use, and all were found in a tight pile, indicating they may once have been in a bag or basket.
Middle Pleistocene teeth adding new data to discussion of evolutionary course in Asian hominins
Story of human origins continues to be rewritten in East Asia -- Science & Technology -- imiinternasjonal.com
Electron Paramagnetic Resonance n. MeSH A technique applicable to the wide variety of substances which exhibit paramagnetism because of the magnetic moments of unpaired electrons. The spectra are useful for detection and identification, for determination of electron structure, for study of interactions between molecules, and for measurement of nuclear spins and moments. Electron paramagnetic resonance EPR or electron spin resonance ESR spectroscopy is a technique for studying materials with unpaired electrons.
Although a relatively large number of late Middle Pleistocene hominins have been found in East Asia, these fossils have not been consistently included in current debates about the origin of anatomically modern humans AMHS , and little is known about their phylogenetic place in relation to contemporary hominins from Africa and Europe as well as to Upper Pleistocene hominins. LIU Wu, Institute of Vertebrate Paleontology and Paleoanthropology IVPP , Chinese Academy of Sciences, and his international collaborators present a detailed description and comparative analysis of four hominin teeth I 1 , C 1 , P 3 and P 3 recovered from the late Middle Pleistocene cave site of Panxian Dadong, Guizhou of southwestern China, including two new teeth recovered in and the reassessment of two teeth already described. The Panxian Dadong teeth combine archaic and derived features that align them with Middle and Upper Pleistocene fossils from East and West Asia and Europe, providing new data for the discussion about the evolutionary course of the Middle Pleistocene of Asia. Researchers reported online March 4 in Journal of Human Evolution For the past two decades, research and debates on modern human origins have focused on the emergence of AMHS around the world.
The species, whose bones bore similarities to the remains of other species within the human genus Homo , as well as to those of Australopithecus , is thought to have evolved about the same time as the first members of Homo , some 2. A new study, however, strongly suggests that the actual remains found in the Dinaledi Chamber may be far more recent. It possessed other features, including the pelvis, shoulder girdle, femur, and size of the brain cavity, that were more reminiscent of those found in Australopithecus , a lineage that most paleontologists believe was ancestral to genus Homo , and thus us Homo sapiens. With H.