Origin of radiocarbon dating
Words nearby radiocarbon dating
How to use radiocarbon dating in a sentence
That’s based on radiocarbon dating of the remains of grass seeds buried in the layers of sediment above and below the tracks.23,000-year-old footprints suggest people reached the Americas early|Kiona N. Smith|September 23, 2021|Ars Technica
Improved radiocarbon dating techniques applied to remains of short-lived plant species unearthed at archaeological sites are also producing a chronology of Polynesian colonization close to that proposed in the genetic study, Lipo says.DNA offers a new look at how Polynesia was settled|Bruce Bower|September 22, 2021|Science News
Hunter-gatherers have been coming to this place for around 12,000 years, according to radiocarbon dating of sediments on the cave floor.What’s in a packrat’s petrified pee? Just a few thousand years of secrets.|Rachel Feltman|August 12, 2021|Popular-Science
The bones were too old for radiocarbon dating, which only works well on organic remains from the past 40,000 years or so.A Cave Site in Kenya’s Forests Reveals the Oldest Human Burial in Africa|Alison Crowther|May 28, 2021|Singularity Hub
The bone, just the fragment of a femur, comes from a dog that lived about 10,150 years ago, based on radiocarbon dating.An ancient dog fossil helps trace humans’ path into the Americas|Anushree Dave|March 1, 2021|Science News
“I think for trans men who are dating every time they hook up they have another coming out,” Sandler said.
The digital dating sphere can prove tricky, and bruising, for the trans user.
But he, like many people using dating apps whatever their sexual identity, remains stoutly positive.
Allegations of transphobia are not new in the world of gay online dating.
It was hard not to take it as a sign, a personal comment on my own Jewish dating failings.
There are two or three ancient churches dating from Saxon times which exhibit some remarkable specimens of Saxon architecture.
The island is charming and interesting, with ruins and relics dating from the time itPg 304 was an independent kingdom.
A part of the original building which yet remains is claimed to be still older, dating from the first century.The Catacombs of Rome|William Henry Withrow
The next in order are those in Rome, of which there are a very large number in existence, dating from the 8th to the 11th century.
They would clear out without waiting to part their hair, and I could take my own time about dating the explosion.A Connecticut Yankee in King Arthur's Court, Complete|Mark Twain (Samuel Clemens)
British Dictionary definitions for radiocarbon dating
Scientific definitions for radiocarbon dating
A Closer Look
In the late 1940s, American chemist Willard Libby developed a method for determining when the death of an organism had occurred. He first noted that the cells of all living things contain atoms taken in from the organism's environment, including carbon; all organic compounds contain carbon. Most carbon consists of the isotopes carbon 12 and carbon 13, which are very stable. A very small percentage of carbon, however, consists of the isotope carbon 14, or radiocarbon, which is unstable. Carbon 14 has a half-life of 5,780 years, and is continuously created in Earth's atmosphere through the interaction of nitrogen and gamma rays from outer space. Because atmospheric carbon 14 arises at about the same rate that the atom decays, Earth's levels of carbon 14 have remained fairly constant. Once an organism is dead, however, no new carbon is actively absorbed by its tissues, and its carbon 14 gradually decays. Libby thus reasoned that by measuring carbon 14 levels in the remains of an organism that died long ago, one could estimate the time of its death. This procedure of radiocarbon dating has been widely adopted and is considered accurate enough for practical use to study remains up to 50,000 years old.