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Ghosts, goblins and things that go "bump" in the night aren't nearly as frightening as cavities and decaying teeth, according to Washington Dental Service. Each year, the nonprofit organization embarks on its annual campaign to educate parents about the severe effects that recurrent sugar consumption has on children's teeth. Dental disease is the number one chronic disease of early childhood.

Paleontologists have long debated the function of the strange, bony crests on the heads of the duck-billed dinosaurs known as lambeosaurs. The structures contain incredibly long, convoluted nasal passages that loop up over the tops of their skulls. Scientists have now used CT-scanning to look inside these mysterious crests and reconstruct the brains and nasal cavities of four different lambeosaur species.