Abstract
This paper presents evidence that virtually all electrons and nuclei of the atoms that are or have been part of living matter on Earth came from almost all stars in our and nearby galaxies and even from all other galaxies in the Universe that have produced observed high-energy gamma rays. However, a standard 70 kg human is always making about 7
3
He, 600
40
Ca, and 3000
14
N nuclei every second by radioactive decay of
3
H,
40
K, and
14
C, respectively.
Subject
General Agricultural and Biological Sciences,General Biochemistry, Genetics and Molecular Biology
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