I am just curious with the fact that our body is made of so many chiral molecules the DNA that we possess is chiral, the amino acids in our body is chiral and there are many other objects other than the molecules which show chirality. So,I want to know what is the origin of chirality in the universe.

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    $\begingroup$ For all we know, it is just a coincidence. $\endgroup$ – Ivan Neretin Dec 15 '18 at 11:22
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    $\begingroup$ Perhaps a distinction should be made. The reason why there are chiral molecules in the first place is that some atoms (notably, carbon) can have stable asymmetric substitution, I'd say. So it's really a fundamental physical property of matter; I'm not sure things could work any other way; maybe some physics experts know. Then the fact that most amino acids making up the proteins in the human body have one specific configuration (S) rather than the opposite one (R) is indeed probably just a coincidence. Very interesting question though. $\endgroup$ – user6376297 Dec 15 '18 at 14:31
  • $\begingroup$ First consider the comment of @user6376297. Lots of molecules must be chiral by existence! For why in leaving kingdom there is a large excess of one form: digging the web you find scientific hypothesis, of which I link an example sciencedaily.com/releases/2011/01/110107145634.htm $\endgroup$ – Alchimista Dec 15 '18 at 17:59
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    $\begingroup$ IT is a big question with a lot of uncertainty about the true answer. But one chemical phenomenon is important whatever the mechanism and that is the ability of certain reactions to increase small differences in the ratio of chiral enantiomers by self-catalytic reactions. In short: start with a small excess and end up with a large one. What caused the initial imbalance could be chance or the result of a small chiral imbalance caused by some nuclear processes some of which are not symmetric in reflection. $\endgroup$ – matt_black Dec 15 '18 at 20:55
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    $\begingroup$ I'm voting to close this question as off-topic because it's not about chemistry. $\endgroup$ – Mithoron Dec 15 '18 at 22:16

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