Why does dust make us sneeze?

There are lots of reasons to sneeze - you have a cold, you get a whiff of pepper or someone tickles your nose with a feather! But why is it that dust makes us sneeze? We asked otolaryngologist Laura Orvidas to help us find the answer.Got a question that’s gathering dust in your brain? Send it to us atBrainsOn.org/contact, and we’ll help you sniff out the answer.