Template:Are You Sure/November 24

1961: Baby Tooth Survey: Preliminary results published by the team in the November 24, 1961, edition of the journal Science showed that levels of strontium 90 in children had risen steadily in children born in the 1950s, with those born later showing the most increased levels. The results of a more comprehensive study of the elements found in the teeth collected showed that children born after 1963 had levels of strontium 90 in their baby teeth that were 50 times higher than those found in children born before the advent of large-scale atomic testing. The findings helped convince U.S. President John F. Kennedy to sign the Partial Nuclear Test Ban Treaty with the United Kingdom and Soviet Union, which ended the above-ground nuclear weapons testing that placed the greatest amounts of nuclear fallout into the atmosphere.