Researchers have finally seen how some smell receptors bind to odor molecules. The work yields new insights into one of the most mysterious and versatile senses. Smell, rather than sight, reigns as the supreme sense for most animals.
https://www.quantamagazine.org/secret-workings-of-smell-receptors-revealed-for-first-time-20210621/
https://www.quantamagazine.org/secret-workings-of-smell-receptors-revealed-for-first-time-20210621/