Climate records from a Japanese lake are set to improve the accuracy of the dating technique, which could help to shed light on archaeological mysteries such as why Neanderthals became extinct.
Carbon dating is used to work out the age of organic material — in effect, any living thing.
Between then and 1945 she appeared in nine feature films, working out of contract for almost all of the major studios in Hollywood.
These included ‘Jane Eyre’, ‘Frenchman’s Creek’ and director Clarence Brown’s Academy Award winning ‘National Velvet’, all 1944 the latter with teenage daughter Angela Lansbury and noteworthy also for the first starring role of twelve year old Elizabeth Taylor.
This union lasted until Lansbury’s death in 1934 and produced three children, the eldest of which was Angela, born in 1925 but her career, shelved from the late twenties due to family commitments, was by the end of the thirties all but defunct.
Another relationship around this time brought no stability to her life and in 1942, together with her children, including Isolde, a daughter fom her first marriage, she abruptly left England, hoping to re-invent herself in America.
Her first marriage to actor/writer Reginald Denham ended in 1924 after seven years and soon afterwards she married Edgar Lansbury, the son of Labour party leader George Lansbury.
Various geologic, atmospheric and solar processes can influence atmospheric carbon-14 levels.
Since the 1960s, scientists have started accounting for the variations by calibrating the clock against the known ages of tree rings.
“If you’re trying to look at archaeological sites at the order of 30,000 or 40,000 years ago, the ages may shift by only a few hundred years but that may be significant in putting them before or after changes in climate,” he says.
Take the extinction of Neanderthals, which occurred in western Europe less than 30,000 years ago.