Lice... the mere mention of them is enough to make most people all itchy. Well, get ready to get scratching, because we've compiled seven squirm-inducing lice facts on this week's List Show!

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Sources:
https://projects.ncsu.edu/cals/course/ent425/library/compendium/phthiraptera.html
http://www.cdc.gov/parasites/lice/head/gen_info/faqs.html
http://www.cdc.gov/parasites/lice/head/biology.html
http://www.livescience.com/41028-lice-reveal-clues-to-human-evolution.html
http://www.livescience.com/9225-humans-lice-clothed-naked-hairless-bodies.html
https://blogs.scientificamerican.com/guest-blog/of-lice-and-men-an-itchy-history/
https://www.sciencedaily.com/releases/2008/02/080207120006.htm
http://www.cfp.ca/content/58/8/839.long
http://www.zoologia.hu/list/Why_infest.pdf
http://pediatrics.aappublications.org/content/114/3/e275.full
http://www.livescience.com/55695-lice-resistant-to-treatment.html
http://jme.oxfordjournals.org/content/early/2016/03/30/jme.tjw023
http://news.bbc.co.uk/2/hi/health/4534540.stm
http://phthiraptera.info/Publications/38690.pdf
http://mbe.oxfordjournals.org/content/28/1/29.full.pdf
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2083419/
http://news.nationalgeographic.com/news/2007/03/070316-gorilla-lice.html
http://www.smithsonianmag.com/science-nature/nitpicking-the-lice-genome-to-track-humanitys-past-footsteps-29121653/
http://www.livescience.com/27523-lice-genes-reveal-human-migration.html
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4978820/
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0057619#pone.0057619-Burgess2