Roberta McKinnon, age 11, is a science nerd and big dreamer. She likes to add to this resume, "And guess what? I'm blonde " She and her best friend, Marilee Evans, are trying to figure out how to beat the impossibly brilliant Henry Horton Harris Helmsby---the 4 Hs of the Apocalypse---at the upcoming science fair. Allagash, Maine, their little hometown, is famous for something called "The Allagash Abductions," when four men from Vermont claimed...