Word: carbonations
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Ever since its development in the 1940s, radiocarbon dating has been a vital tool for historians and paleontologists trying to pinpoint the ages of everything from ancient animal bones to prehistoric human settlements to Egyptian mummies. By measuring the decay of the natural radioactive isotope carbon 14, which almost all organisms ingest while they are alive, scientists can estimate how long it has been since an animal or plant died...
...this case, samples came from a coral reef off Barbados. Carbon 14 and uranium-thorium dating largely agreed for pieces of coral up to about 9,000 years old. But for older pieces the findings diverged, with a maximum disparity of 3,500 years for coral about 20,000 years...
...never thought my one year of Harvard education would mean very much in the real world, but I still hoped for something more interesting than handing out casino coupons and inhaling carbon monoxide fumes on a bus platform...
Smoke from burning coal and car exhausts contains carbon monoxide, a host of carcinogens and sulfur dioxide, which helps form the acid rain that is withering Europe's once lush forests. In Poland more than 50,600 hectares (125,000 acres) of woodland have been destroyed, and nearly half the remaining trees are damaged. More than 32,400 hectares (80,000 acres) of Czechoslovakia's forests have been lost...
...final chapters of his book on Stalin. Medvedev showed my essay to friends (which I had given him permission to do), and he passed on their comments. After making a few changes, I gave the manuscript back to Medvedev. He was going to produce a dozen or more carbon copies. Some, he warned me, might end up abroad. I replied that I had taken that into account. (We were communicating in writing to foil eavesdroppers...