Respect for the left-handed Spiral

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When I was researching quartz, I learned that there are types of quartz called left-handed and right-handed quartz. This is determined by whether the direction of the spiral structure of the quartz crystal is left-handed or right-handed. A mirror-like symmetrical shape is also called chirality, and there seem to be quite a lot of molecules with this shape.

https://www.ritsumei.ac.jp/news/detail/?id=3597

Mirror-symmetrical molecules, also known as enantiomers, are classified as L-amino acids, meaning left-handed, and D-amino acids, meaning right-handed. In general, left-handed and right-handed amino acids seem to exist equally, but most of the amino acids that make up living organisms on Earth are left-handed. The reason for this extreme bias is still unknown. It’s mysterious.

https://www.s-graphics.co.jp/tankentai/news/lefthanded.htm

Also, sugars are all right-handed, and DNA appears to be right-handed. The molecules that make up DNA, called nucleotides, only exist left-handed, and DNA formed by left-handed nucleotides always becomes right-handed. So the molecules that make up DNA are left-handed. Why are there so many left-handed molecules? It seems like snails are mostly right-handed.

https://logmi.jp/knowledge_culture/culture/321843

Sunlight also contains left-handed and right-handed light, which is called circularly polarized light. It is said that the photosynthetic pigment chlorophyll and legume plants prefer left-handed circularly polarized light. This chlorophyll is also a left-handed molecule. In addition, the wings of beetles such as scarab beetles also reflect only left-handed circularly polarized light.

https://rpn.sakura.ne.jp/rm/sci/goldbug/goldbug.html

In the world of molecules, there seem to be many things that have extreme left-right bias, but when we look into the even smaller world of elementary particles, we find that even here there are things that only have left-handed handedness. When a proton becomes a neutron in a phenomenon called beta decay, the elementary particle that is emitted is said to always be left-handed. The force that occurs at this time, called the weak interaction, only acts on left-handed elementary particles.

https://www.astroarts.co.jp/article/hl/a/11095_leptogenesis

Although there are also right-handed ones, the prevalence of left-handed ones is strange. I thought the natural world was balanced, but it seems to be quite unbalanced. There seems to be some meaning to this as well. Left-handed ones are amazing. The mystery of amino acids on Earth is amazing.

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