Professors Mary Carskadon and Judith Owens discuss teens’ sleep needs and answer listeners’ questions. To listen to an MP3 recording of the show, go to http://media32b.libsyn.com/podcasts/sciencefriday/scifri-2006033112.mp3?aHeaeJh1bHnIdWd8aHdvqWuqZnOZ

Economics Professor Glen Loury is a guest for the roundtable discussion of “News and Notes with Ed Gordon,” which airs on National Public Radio. This week’s show included discussion about black leadership and U.S. health care. Loury and Gordon were joined by Michael Meyers, executive director of the New York Civil Rights Coalition, and Hofstra University journalism Professor E.R. Shipp.

Brown admission practices are included in this wrap-up article about the College Board’s SAT scoring errors and how the mistake affected high school seniors’ college applications. The student featured in the article’s lead did not apply to Brown, which she considered “her dream school,” because she thought her SAT scores were not high enough to gain entry to Brown.

Dr. Anne DeGroot, adjunct associate professor of medicine and director of the University’s TB/HIV Research Lab, comments on a proposed blood-cleaning machine that could save lives if bird flu becomes a pandemic. (Wired.com, in which this article appeared, is the online companion to Wired magazine.)

Candidates for New Orleans’ mayor face a primary on April 22, and several spoke recently in Houston, where many Hurricane Katrina refugees still live. Sociology Professor John Logan, who in January released a study about New Orleans’ fate post-Katrina, was among the people who offered their perspectives on what challenges the next mayor faces.

Connie Sadler, director of IT security, discusses challenges facing colleges and universities trying to hold the line against threats to campus computing.