Child sexual abuse is any interaction between a child and an adult (or another child) in which the child is used for the sexual stimulation of the perpetrator or an observer. Children of all ages, races, ethnicities, and economic backgrounds are vulnerable to sexual abuse. Children who have been sexually abused may display a range of emotional and…

Nanotechnology is viewed by those in favor of its development in two different ways, and the divide is not recent. This article describes the origins of the differing visions of nanotechnology and examines their broader impacts. The typical history of the field tells nothing about these differing visions, which perhaps misleads. At least two…