The abundance of 14C in the atmosphere and in living organisms is almost constant, but decreases predictably in their bodies after death.. 
O je onídẹ alkálí inu ile ati àpilẹ̀ṣe ana rẹpẹtẹ julo kejo ninu igbelé ayé, lílò to ti je bi 2% fun kerindinlogbon, ati ìJune ni gbogbo agbalaaye ti a mo.itọkasi  awon elimẹ́ńtì Kemi metali metaló ilẹ̀ Ilẹ̀.. 