Objects have histories
Old books, leather, rubber and plastic can change as they age, warm, get wet or absorb their environment.
EXPLAINER
Smell & Everyday Objects
Ordinary objects often carry strong smell identities because materials, manufacturing, age and use leave repeatable sensory cues.
Products create expectations
Soap, toothpaste, sunscreen and new-car interiors often use scent as part of how people identify the product category.
Why the atlas includes them
A universal smell map should not privilege perfume ingredients over the objects people actually encounter every day.
Object pages describe perception and context; they are not chemical safety evaluations.