Dust Bunnies 101
Ever wonder where those small-and-furries come from? Believe it or not, environmental scientists have been trying to pick apart this mystery for years. Turns out the average dust sample can contain anything from insect fecal matter and fungal spores to lawn chemicals and heavy metals—and most of it walks right in through the front door. It's enough to induce a sneezing fit in even the hardiest of humans.