system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If dust is made of dead skin cells, then why are places where there are no people (abandoned house, in your attic) the dustiest?

I understand that places with high traffic don't have as much because the traffic knocks it to the floor (i think???), but why is it that unpopulated places left alone accumulate dust.
gpt
Dust isn't just dead skin cells. Dead insect parts, skin, hair, dirt, organic material, chemicals, plastics, metals, and of course Dorito, Cheeto and Frito crumbs.

Anything small enough to become airborne (or not airborne), float (roll) around awhile and settle somewhere nice and quiet, falls under the "dust" category.