Such calibrated dates are expressed as cal BP, where "cal" indicates "calibrated years", or "calendar years", before From Wikipedia, the free encyclopedia.
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Archived from the original on Article 13 c ". Huth 25 November Scientific Style and Format: Retrieved 4 October Centre for Ice and Climate - University of Copenhagen. Retrieved September 17, Checks with samples of known age". University of Pennsylvania Press. Canon of Kings Lists of kings Limmu.
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The expansion of grassland systems in Africa in relation to mammalian evolution and the origin of the genus Homo. Palaeogeography, Palaeoclimatology, Palaeoecology , Cutmarked bones from Pliocene archaeological sites at Gona, Afar, Ethiopia: Journal of Human Evolution 48, Body proportions of Homo habilis reviewed.
Journal of Human Evolution 46, Dental microwear and diets of African early Homo. Journal of Human Evoution 50, 78— Diet in early Homo: Annual Review of Anthropology 35, Reich and coworkers found that at cryogenic temperatures, lead becomes a superconductor, but the corrosion products formed from centuries of exposure to air and water lead oxide and lead carbonate do not superconduct. Annual Review of Earth and Planetary Sciences.
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The results provide a compelling case for applicability of amino acid racemization methods as a tool for evaluating changes in depositional dynamics, sedimentation rates, time-averaging, temporal resolution of the fossil record, and taphonomic overprints across sequence stratigraphic cycles. The University of Arizona Press. A team from the University of Manchester and the University of Edinburgh has discovered a new technique which they call 'rehydroxylation dating' that can be used on fired clay ceramics like bricks, tile and pottery.
Past history deep time Present Future Futures studies Far future in religion Far future in science fiction and popular culture Timeline of the far future Eternity Eternity of the world. Horology History of timekeeping devices Main types astrarium atomic quantum hourglass marine sundial sundial markup schema watch mechanical stopwatch water-based Cuckoo clock Digital clock Grandfather clock.
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Geological time age chron eon epoch era period Geochronology Geological history of Earth. Chronological dating Chronobiology Circadian rhythms Dating methodologies in archaeology Time geography. Time measurement and standards. Chronometry Orders of magnitude Metrology. Ephemeris time Greenwich Mean Time Prime meridian.
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Absolute space and time Spacetime Chronon Continuous signal Coordinate time Cosmological decade Discrete time and continuous time Planck time Proper time Theory of relativity Time dilation Gravitational time dilation Time domain Time translation symmetry T-symmetry. Chronological dating Geologic time scale International Commission on Stratigraphy.
Galactic year Nuclear timescale Precession Sidereal time. Canon of Kings Lists of kings Limmu. Chinese Japanese Korean Vietnamese. Lunisolar Solar Lunar Astronomical year numbering.