The Argument From Cosmic Fine Tuning
by Jonathan Mclatchie
The concept of cosmic fine tuning relates to a unique property of our universe whereby the physical constants and laws are observed to be balanced on a ‘razor’s edge’ for permitting the emergence of complex life. The degree to which the constants of physics must match precise criteria is such that a number of agnostic scientists have concluded that indeed there is some sort of transcendent purpose behind the cosmic arena. British astrophysicist Fred Hoyle writes: “A common sense interpretation of the facts suggests that a super intellect has monkeyed with physics, as well as with chemistry and biology, and that there are no blind forces worth speaking about in nature. The numbers one calculates from the facts seem to me so overwhelming as to put this conclusion almost beyond question.”
The ripples in the universe left over from the original ‘Big Bang’ singularity (often referred to as CMB, or cosmic background radiation) are detectable at one part in 10^5 (100,000). If this factor were even slightly smaller, the cosmos would exist exclusively as a collection of gas — stars, planets and galaxies would not exist. Conversely, if this factor were increased slightly, the universe would consist only of large black holes. Either way, the universe would be uninhabitable.
Another finely tuned value is the strong nuclear force that holds atoms — and therefore matter — together. The sun derives its ‘fuel’ from fusing hydrogen atoms together. When two hydrogen atoms fuse, 0.7% of the mass of the hydrogen atoms is converted into energy. If the amount of matter converted were slightly smaller — say, 0.6% instead of 0.7% — a proton would not be able to bond to a neutron and the universe would consist only of hydrogen. Without the presence of heavy elements, planets would not form and hence no life would be possible. Conversely, if the amount of matter converted were increased to 0.8% instead of 0.7%, fusion would occur so rapidly that no hydrogen would remain. Again, the result would be no planets, no solar systems and hence no life…
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