What actually are scents?
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A “scent” is a smell that something has. Things smell because tiny molecules on them fall off and are carried by the movement of air into your nose. When they get into your nose, they tickle proteins on cells in your nose that respond to different shapes of molecules bumping into them, and these stimulate nerve cells that signal your brain to sense a smell. Most scents aren’t just one molecule, but a mixture of many different ones that tickle differently.
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