Louis Pasteur showed how some molecules are optically asymmetrical by investigating tartaric acid compounds present in wine.
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Watch the full third lecture of the series: https://www.rigb.org/christmas-lectures/watch/1992/our-world-through-the-looking-glass/the-handed-molecule?utm_source=youtube&utm_medium=social&utm_term=description
Charles Stirling gave the 1992 Christmas Lectures "Our World Through the Looking Glass" about the role of chirality in our highly symmetrical world.
His third lecture, where this clip is from, closely explores the symmetry and asymmetry of molecules.
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