Radioactive dating turin shroud
In the new method, scientists place an entire artifact in a special chamber with a plasma, an electrically charged gas similar to gases used in big-screen plasma television displays.The gas slowly and gently oxidizes the surface of the object to produce carbon dioxide for C-14 analysis without damaging the surface, he said.Funding for this project is provided by the National Science Foundation, the National Center for Preservation Technology and Training, and Texas A&M University.One popular theory about the Paleolithic cave paintings proposes that sites were chosen based on the acoustics in the caves.
But are plants included in this universal common ancestor?
Rowe and his colleagues used the technique to analyze the ages of about 20 different organic substances, including wood, charcoal, leather, rabbit hair, a bone with mummified flesh attached, and a 1,350-year-old Egyptian weaving.
The results match those of conventional carbon dating techniques, they say.
Although it sometimes requires taking minute samples of an object, even that damage may be unacceptable for some artifacts.
The new method does not involve removing a sample of the object.Both the conventional and new carbon dating methods can determine the age of objects as far back as 45,000 to 50,000 years, Rowe said.