February 25, 2012
"核実験で放射性同位元素の炭素14が大気中に散布されたため、放射性炭素年代測定法による年代測定は、1950年頃以降を特定するための年代測定としては、従来の手順では使えなくなった。"

— 核実験 - Wikipedia (via kirisaki)

(via kurose-th)

7:51pm  |   URL: http://tmblr.co/ZXyKQyG-PY48
(Notes: 14)
  
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