What makes up 20 to 50% of household dust?

So, I probably lost about 50,000 cells in the time it took me to read everyone's comments.

I didn't know that, I will bookmark this question and answer.

I didn't know that. That's why i like this game!

Hugo, whoever said humans don't shed must have not heard of dead skin cells, whatever the stats, we SHED

alexandra, no you get itchy from the dust mites, microscopic arachnids, that feed on the dead cells and also crawl all over your body. Their waste, poo, is what makes you itchy. And moreso the plant pollen that your immune system sees as antigens and produces an allergic reaction.

In a place where there is less air pollution ok. My mom complains she has to mop the house every day because dust from air outside settles inside. This is in Nepal btw.

so I get itchy from other people's dead skin...

and of course bed bugs/dust mites like eating it!!

I'm not so sure on those stats..