The bomb pulse is the sudden increase of Carbon-14 (14C) in the Earth's atmosphere due to the execution of hundreds of aboveground nuclear tests. Testing of atomic bombs started in 1945 and intensified between 1950 until 1963 when the Limited Test Ban Treaty was signed by the United States, the Soviet Union and Great Britain. These hundreds of blasts were followed by a doubling of the concentration of 14C in the atmosphere. With the ban on aboveground nuclear testing, the concentration of 14C has been decreasing towards normal levels. Carbon-14, the radioisotope of Carbon-12, is present in trace amounts in the atmosphere and it can be detected in all living organisms, since Carbon is continually incorporated into the molecules forming the cells of the organism. Doubling of the concentratio