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If the big bang has actually occurred, transforming vast energy into all of the matter of the universe, then that would have created as much antimatter as matter.
Extensive compelling scientific investigation including repeatable experiments suggests that there is an entire cosmos worth of antimatter that should have been created by the big bang within our universe that, thankfully, simply does not exist.
When supercolliders form matter from energy, as expected from the laws of physics, equal parts of matter and antimatter form; and if they come into contact, they annihilate one another.
Big Bang theorists have spent decades looking for antimatter regions of the universe with leading astronomers culminating a significant project by writing in The Astrophysical Journal: "we conclude that a matter-antimatter symmetric universe is empirically excluded." The journal reports a physicist's assessment: "The work is extremely compelling and gives me fresh pessimism" that is, on the difficulty of explaining why the universe even exists.
Fluoridated water allows exchange in the teeth of fluoride ions for hydroxyl groups in apatite.
Fluoro-chloro apatite forms the basis of the now obsolete Halophosphor fluorescent tube phosphor system.
Dopant elements of manganese and antimony, at less than one mole-percent, in place of the calcium and phosphorus impart the fluorescence, and adjustment of the fluorine-to-chlorine ratio adjusts the shade of white produced.
Consider: - the enormous cold spot in the universe - the CMB's axis of evil - the quantized redshifts of a million galaxies so far do not affirm the Copernican principle and instead suggest that the universe have a center near the Milky Way - the Milky Way resides in a low density void two billion light years in diameter - the superstructures of the universe including the astounding 5-billion-light-year spiral of galaxies discovered in 2015 - the fine structure that appears to have a smaller value in one direction of the universe and a larger in another - the fractal distribution of matter throughout the universe apparently observed on all scales.
"My contention is that it is clumpy on all the scales so far explored,” says University of Geneva astronomer Francesco Sylos Labini.