VIDEO: In the night, while you sleep, a hidden world of tiny insects flourishes in your bed sheets. David Bodanis, author of "Einstein's Greatest Mistake", takes us into the strange world of dust mites.
Dr. Alan Hedge is a professor in the Department of Design and Environmental Analysis at Cornell University. He is also a certified professional ergonomist. Dr. Alan Hedge explains how to buy the best mattress for a good night sleep.
Dust, pollen, mould, and chemicals are just a...
An unmade bed is less hospitable to the little creatures.