28 relations: Ab urbe condita, After the Development of Agriculture, Anno Domini, Anno Mundi, Anthropocene, Archaeology, Carbon-12, Carbon-14, Common Era, Cosmic time, Dendrochronology, Epoch (astronomy), Geologic time scale, Geology, Hijri year, Holocene calendar, Hydrate, Isotopes of carbon, Metrology, National Institute of Standards and Technology, Nuclear weapons testing, Oxalic acid, Quaternary Geochronology, Radiocarbon (journal), Radiocarbon dating, Science, Stratigraphy, Year.
Ab urbe condita or Anno urbis conditae (abbreviated: A.U.C. or AUC) is a convention that was used in antiquity and by classical historians to refer to a given year in Ancient Rome.
After the Development of Agriculture (A.D.A.) is a system for counting years forward from 8000 BCE.
The terms anno Domini (AD) and before Christ (BC) are used to label or number years in the Julian and Gregorian calendars.
Anno Mundi (Latin for "in the year of the world"; Hebrew:, "to the creation of the world"), abbreviated as AM or A.M., or Year After Creation, is a calendar era based on the biblical accounts of the creation of the world and subsequent history.
The Anthropocene is a proposed epoch dating from the commencement of significant human impact on the Earth's geology and ecosystems, including, but not limited to, anthropogenic climate change.
Archaeology, or archeology, is the study of humanactivity through the recovery and analysis of material culture.
Carbon-12 is the more abundant of the two stable isotopes of carbon (Carbon-13 being the other), amounting to 98.93% of the element carbon; its abundance is due to the triple-alpha process by which it is created in stars.
Carbon-14, 14C, or radiocarbon, is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.
Common Era or Current Era (CE) is one of the notation systems for the world's most widely used calendar era – an alternative to the Dionysian AD and BC system.
Cosmic time (also known as time since the big bang) is the time coordinate commonly used in the Big Bang models of physical cosmology.
Dendrochronology (or tree-ring dating) is the scientific method of dating tree rings (also called growth rings) to the exact year they were formed in order to analyze atmospheric conditions during different periods in history.
In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.
The geologic time scale (GTS) is a system of chronological dating that relates geological strata (stratigraphy) to time.
Geology (from the Ancient Greek γῆ, gē, i.e. "earth" and -λoγία, -logia, i.e. "study of, discourse") is an earth science concerned with the solid Earth, the rocks of which it is composed, and the processes by which they change over time.
The Hijri year (سَنة هِجْريّة) or era (التقويم الهجري at-taqwīm al-hijrī) is the era used in the Islamic lunar calendar, which begins its count from the Islamic New Year in 622 AD.
The Holocene calendar, also known as the Holocene Era or Human Era (HE), is a year numbering system that adds exactly 10,000 years to the currently dominant (AD or CE) numbering scheme, placing its first year near the beginning of the Holocene geological epoch and the Neolithic Revolution, when humans transitioned from a hunter-gatherer lifestyle to agriculture and fixed settlements.
In chemistry, a hydrate is a substance that contains water or its constituent elements.
Carbon (6C) has 15 known isotopes, from 8C to 22C, of which 12C and 13C are stable.
Metrology is the science of measurement.
The National Institute of Standards and Technology (NIST) is one of the oldest physical science laboratories in the United States.
Nuclear weapons tests are experiments carried out to determine the effectiveness, yield, and explosive capability of nuclear weapons.
Oxalic acid is an organic compound with the formula C2H2O4.
Quaternary Geochronology is a peer-reviewed scientific journal addressing methods and results in the dating of samples from the Quaternary Period.
Radiocarbon is a scientific journal devoted to the topic of radiocarbon dating.
Radiocarbon dating (also referred to as carbon dating or carbon-14 dating) is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon.
R. P. Feynman, The Feynman Lectures on Physics, Vol.1, Chaps.1,2,&3.
Stratigraphy is a branch of geology concerned with the study of rock layers (strata) and layering (stratification).
A year is the orbital period of the Earth moving in its orbit around the Sun.
BP cal, BP calibrated, Before Physics, Before Present Era, Before present, Before present day, Before the Present Era, Cal BP, Calibrated BP, Calibrated YBP, Geology timeline, Lookback time, Present Era, YBP, Ybp, Years BP, Years before present.