The following correction was printed in the Guardian's Corrections and clarifications column, Wednesday 24 March This article about traces of radioactive carbon being found in wine said that the last atmospheric atomic bomb tests took place in the s. That is true of American nuclear tests, but France carried on testing in the atmosphere until and China until A trace of Bikini atoll could join hints of black cherry and complex citrus notes in the sommelier's lexicon for describing fine wines, research has suggested. Harmless amounts of radioactive carbon have been found in wines made from grapes harvested since the last atmospheric atomic bomb tests were carried out in the s.
After the A-bomb: Hiroshima and Nagasaki then and now – in pictures
Radioactivity : Military Applications
In , researchers uncovered nine partial skeletons from nine different ancient individuals in the Liang Bua cave, located on the Indonesian island of Flores. The remains belonged to an early hominid species that—like humans—walked upright and used tools. Unlike Homo sapiens, however, the newly discovered species was considerably smaller in stature, standing only 3. Judging from the one complete skull the archaeologists found, they also had significantly smaller brains. Initially, scientists dated some of the H. By that time, humans had definitively colonized Southeast Asia, and it seemed highly unlikely that the two species had coexisted for thousands of years. According to new research published earlier this year, however, H.
With an accout for my. Radiocarbon dating is a radiometric dating method that uses the naturally occurring isotope carbon 14 C to determine the age of carbonaceous materials up to about 60, years. Such raw ages can be calibrated to give calendar dates. The technique of radiocarbon dating was discovered by Willard Libby and his colleagues in  during his tenure as a professor at the University of Chicago. Libby estimated that the steady state radioactivity concentration of exchangeable carbon would be about 14 disintegrations per minute dpm per gram.
Activists in the anti-Bomb movement were surprised in the spring of when, after finishing a particularly dirty fallout-heavy series of tests, the Soviets called for an immediate halt to all nuclear testing, an obvious political move timed to generate worldwide support and to highlight -- and possibly prevent -- an upcoming US test series. It was important to Pauling that at least one nation was taking the anti-testing movement seriously. But the Soviet move had little real-world effect.