Nice picture, huh? I like and encourage the reading of a variety of head lice fact sheets from a variety of research centres/universities. While the facts are usually (but not always) the same, they occasionally use different language that helps you understand an issue more clearly. For example, here's an excerpt from the fact sheet from the Entomology Department of the College of Agricultural Sciences of Penn State University. It is regarding the viability of eggs that are not right near the scalp:
