is a technique used by scientists to learn the ages of biological specimens – for example, wooden archaeological artifacts or ancient human remains – from the distant past.
It can be used on objects as old as about 62,000 years.
Details Calibration of a radiocarbon age of 6550 ± 40 BP of a terrestrial sample from the Northern Hemisphere, using Int Cal04 calibration curve and Ox Cal program version 3.10.The level of bomb carbon was about 100% above normal levels between 19.The level of bomb carbon in the northern hemisphere reached a peak in 1963, and in the southern hemisphere around 1965.Long-term Effects to Radiocarbon Levels Even after nuclear weapon testing was banned, the bomb effect still remains. of Honolulu - DOMINIC I/FISHBOWL--Starfish Prime 1.4 Mt, Alt 400 Km 1968-1980 - Virus Cancer Program - National Institutes of Health attempts to prove that viruses caused human cancer - Gallo - Human Genome Project1969 - Nixon ends Bio Warfare development with Geneva Accord1971 - Nixon begins "War on Cancer" 10/00 1971 - Army's Fort Detrick, Maryland, biological warfare facility was converted to a cancer research center1998 - Pakistan The government says there is no danger.... is eliminated from the body with a biological half-life of 40 days. Carbon-14 poses a health hazard only if it is taken into the body,because it decays by emitting a weak beta particle with no gamma radiation.According to literature, the excess carbon 14 produced during nuclear weapons testing has already decreased due in part to the global carbon exchange cycle. of Honolulu - HARDTACK I--Orange -- 3.8 Mt, Alt 43 Km July 1962 - High-altitude nuclear explosions - Johnston Island, 717 miles W. The beta particle emitted bycarbon-14 has low energy and cannot penetrate deeply into tissue or travel far in air.