It's Day 2 of our trip down Maddie Sofia memory lane! Today's encore episode is all about how you're never really alone.

We look at the tiny mites that live on your skin — including your face. They come out at night and mate. And we're not totally sure what they eat. See? Don't you feel better already?

Researcher Megan Thoemmes tells us about the lives of these eight-legged creatures — and what they can tell us about ourselves.

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