Nematodes worm their way back to the top.
Horseman
Robert E
RE
D000818:Animals; D016494:Computer Security; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D049691:History, Medieval; D006801:Humans; D009348:Nematoda; D009626:Terminology as Topic; D014098:Toothache / Q000266:history; D014925:Wit and Humor as Topic