Original: References See also Pest Use of DNA in forensic entomology Whale louse , unrelated crustaceans that live parasitically on marine mammals External links Lice Pest Control Information - National Pesticide Information Center Bed-hopping led humans to 3 million-year itch www.phthiraptera.org has extensive scientific information .
Simplified: Other pages Pest Use of DNA in forensic entomology Other websites Lice Pest Control Information - National Pesticide Information Center Bed-hopping led humans to 3 million-year itch www.phthiraptera.org has extensive scientific information .