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A child mummy is found high in the Andes and the archaeologist says the child lived more than 2,000 years ago.How do scientists know how old an object or human remains are?It is naturally unstable and so it will spontaneously decay back into N-14 after a period of time.


C-14 is produced in the upper atmosphere when nitrogen-14 (N-14) is altered through the effects of cosmic radiation bombardment (a proton is displaced by a neutron effectively changing the nitrogen atom into a carbon isotope).The new isotope is called "radiocarbon" because it is radioactive, though it is not dangerous.


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    In his explanatory note, Roque noted that various groups, lawmakers, Martial Law victims, and their relatives have opposed transferring Marcos’ remains from Batac, Ilocos Norte to the Libingan ng mga Bayani on September 18 “given the human rights record of the Martial Law years.” “The State, in the spirit of democratic deliberation, may address the simmering controversy through the People’s representatives in Congress, through a legislative act that honors the memories of those who suffered under Martial Law as well as affords a former President of the Republic a final resting place for his remains,” said Roque.

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    For the central bank of the United States, see Federal Reserve System.

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