Radiocarbon dating used

11-Nov-2017 17:28

Scientists across countless disciplines rely on it to date objects that are tens of thousands of years old. An analysis by Heather Graven, a climate-physics researcher at Imperial College London, finds that today's rate of fossil-fuel emissions is skewing the ratio of carbon that scientists use to determine an object's age.

Combustion of fossil fuels is “diluting the fraction of atmospheric carbon dioxide containing radiocarbon,” Graven told , the large amount of carbon dioxide in the atmosphere will make new organic material appear to be 1,000 years old based on today’s carbon-dating models.

Carbon-14 is also passed onto the animals that eat those plants.

The beginning of the Holocene (post last ice age) is now universally accepted to be around 12000 BP.Carbon-14 has a half life of 5730 years, meaning that 5730 years after an organism dies, half of its carbon-14 atoms have decayed to nitrogen atoms.

A mediados del siglo VIII los chinos inventaron la impresión xilográfica, o el grabado en madera, y la necesidad de reproducir un gran número de textos e imágenes budistas, calendarios, manuales de adivinación y diccionarios promovió una rápida y temprana propagación de la xilografía.… continue reading »

Read more