An example of analogy used to explain science
"But if every gramme of material contains this tremendous energy, why did it go so long unnoticed? The answer is simple enough: so long as none of the energy is given off externally, it simply cannot be observed. It is as though a man who is fabulously rich should never spend or give away a cent; no one could tell how rich he was. …
Schematically, the process goes like this: An atom of the mass M splits into two atoms of the mass M' and M", which separate with tremendous kinetic energy….The atom M is a rich miser who, during his life, gives away no money (energy). But in his will he bequeaths his fortune to his sons M' and M", on condition that they give to the community a small amount, less than one thousandth of the whole estate (energy or mass). The sons together have somewhat less than the father had (the mass sum M' + M" is somewhat smaller than the mass M of the radioactive atom). But the part given to the community, though relatively small, is still so enormously large (considered as kinetic energy) that it brings with it a great threat of evil."
Albert Einstein
Einstein, A. (1994). E = mc2 (S. Bargmann, Trans.). In Ideas and Opinions. The Modern Library. (First published 1946)
Read examples of scientific analogies
