The DNA inside our cells almost exclusively twists in one direction, but the reason for this might be out of this world!
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Sources:
https://iopscience.iop.org/article/10.1088/1742-6596/635/1/012015/pdf
http://www.jbc.org/content/264/14/7921.long
https://upload.wikimedia.org/wikipedia/commons/b/b9/A-B-Z-DNA_Side_View.png
https://books.wwnorton.com/books/webad.aspx?id=4294997087
https://physics.aps.org/articles/v7/94
https://pdfs.semanticscholar.org/0d92/a2bede06d04c31ac3c4699e57bd1a4ee3ce5.pdf
https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.101.178301
https://phys.org/news/2018-05-nature-exclusively-left-chilled-atoms.html
Images:
https://commons.wikimedia.org/wiki/File:A-DNA,_B-DNA_and_Z-DNA.png
https://commons.wikimedia.org/wiki/File:Chirality_with_hands.svg
https://commons.wikimedia.org/wiki/File:PIA16938-RadiationSources-InterplanetarySpace.jpg
https://commons.wikimedia.org/wiki/File:Atmospheric_Collision.svg
https://www.istockphoto.com/vector/wild-meadow-flowers-under-a-blue-sky-gm953498268-260269187
https://www.istockphoto.com/vector/dna-molecule-gm175962242-26365128
https://www.istockphoto.com/vector/college-life-icons-poly-series-gm497801107-41715376
https://www.istockphoto.com/photo/dna-sequence-dna-code-structure-with-glow-gm1030969358-276199760
https://www.istockphoto.com/vector/the-chemical-structure-of-a-nucleotide-four-main-bases-found-in-dna-adenine-gm1145778007-308505174
https://www.istockphoto.com/photo/dna-strands-gm154946509-15768844
https://www.istockphoto.com/photo/atom-gm502473347-43786778
https://www.istockphoto.com/photo/adenosine-molecule-isolated-on-white-gm482001098-69765817
https://www.istockphoto.com/photo/macro-oil-and-water-multi-colored-abstract-background-gm1138572520-304017238
https://www.istockphoto.com/photo/milky-way-gm641802942-116379953
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