A previously unknown group of flies is described whose males exhibit directional asymmetry, in that the left wing is larger than, and of a different shape from, the right wing. To our knowledge, wing asymmetry of this degree has not previously been reported in an animal capable of flight. Such consistent asymmetry must result from a left-right axis during development, a level of differentiation...

This retrospective study was undertaken to identify the prevalence of hearing loss in the homeless population and its implications for vocational rehabilitation. Audiometric threshold data for adult residents of an urban homeless shelter were collected and reported. Subjects with hearing loss were identified and defined by their binaural high-frequency pure tone average (B-HFPTA). Those subject...