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The right hand rule does not only apply to electromagnetism etc as have been discussed here. It also applies in chemistry and biology. As has already been pointed out here,most people are right handed. DNA is a right handed double alpha helix. Organic molecules such as glucose etc etc can have either right handed or left handed versions. Right handed versions vastly predominate over left. In fact, some organic molecules have vastly different properties between the right and left handed versions to the extent that if the left handed version was the predominant version, the biology of Earth would be quite different.
Stuart
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