When a creature dies, it ceases to consume more radiocarbon while the C-14 already in its body continues to decay back into nitrogen.
A Triceratops brow horn discovered in Dawson County, Montana, has been controversially dated to around 33,500 years, challenging the view that dinosaurs died out around 65 million years ago.
It takes about 5,730 years for half of a sample of radiocarbon to decay back into nitrogen.
It takes another 5,730 for half of the remainder to decay, and then another 5,730 for half of what's left then to decay and so on.
The finding radically suggests that early humans may have once walked the earth with the fearsome reptiles thousands of years ago.
The Triceratops brow horn was excavated in May 2012 and stored at the Glendive Dinosaur and Fossil Museum.
The new isotope is called "radiocarbon" because it is radioactive, though it is not dangerous.
It is naturally unstable and so it will spontaneously decay back into N-14 after a period of time.Triceratops, a name meaning “three-horned face”, is a genus of herbivorous ceratopsid dinosaur that is said to have first appeared during the late Maastrichtian stage of the late Cretaceous period, about 68 million years ago in what is now North America, and became extinct in the Cretaceous–Paleogene extinction event 66 million years ago.However, scientists from the Paleochronology Group, who perform research relating to “anomalies of science”, maintain that dinosaurs did not die out millions of years ago and that there is substantial evidence that they were still alive as recently as 23,000 years ago.Obviously, this works only for things which were once living. This is how carbon dating works: Carbon is a naturally abundant element found in the atmosphere, in the earth, in the oceans, and in every living creature.by Dr Carl Wieland An attempt to explain this very important method of dating and the way in which, when fully understood, it supports a ‘short’ timescale.