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NPR's David Kestenbaum reports on the newest developments in research on narcolepsy.

NPR's Special Correspondent Susan Stamberg reports on photographer O. Winston Link. A new exhibit of stunning black and white photographs documents the end of the era of steam locomotives in America.

Ina Jaffe reports that new Census information indicates that ethnic minorities will now constitute an majority of California residents.

Michele Kelemen reports from southern Siberia, where computer programmers are hoping to create their own Silicon Valley. Akademgorodok was built as a model town for Soviet scientists. With its highly-educated workforce, it's home to software companies that do programming work -- cheaply -- for Western customers.

NPR News Science Correspondent Richard Harris reports that scientists have been surprised by a rapid change in the Arctic Tundra. When the Arctic air warmed up in the 1980s, this delicate ecosystem started venting large quantities of carbon dioxide gas into the atmosphere, potentially adding to global climate change. But a study in the journal "Nature" finds that arctic plant life has adapted to the changing climate, and is helping soak up some carbon dioxide.

Richard Gonzales reports that the U.S. Supreme Court has issued an emergency order that stops the distribution of marijuana for medical use. The ruling bars implementation of the medical marijuana measure passed by California voters in 1996.

Osteoporosis affects some 10 million Americans now, and those numbers are likely to grow as the baby boom generation ages. Wendy Schmelzer reports on a study in this week's New England Journal of Medicine, which finds that a drug treatment used by women to treat osteoporosis works just as well for men. That's important, because men account for 20 percent of those affected.

Writer Verta Mae Grosvenor examines how massive, rapid resort development has altered life on the Sea Islands off the coast of South Carolina. The long-time residents are the Gullah -- or Geechee -- people. The names are interchangable. The Gullah people are descendents of slaves, and managed for years to retain a distinctive, African-influenced way of life. Some 30 years ago, high-end tourism came to the region. One by one, land was bought up by outside developers. Now the Gullah people want to profit from the little land they still own.

Bill Zeeble of member station KERA in Dallas reports that the city has a new record -- sixty-one days and counting without rain. The previous record was 58 days set back in 1934 and tied in 1950. The dry spell has hit North Texas farmers hard, and it is starting to occasionally impact the city's drinking water. It is also drying out the soil causing the foundations of many houses to settle and generating business for local foundation repair companies.

NPR's Martin Kaste (KAH-stee) talks with host Linda Wertheimer about President Clinton's visit to Colombia to endorse his latest plan to curb drug trafficking. Clinton was meeting Colombian President Pastrana in the coastal city of Cartagena in the wake of a one-point-three-billion dollar package of aid and military support for the Colombian army to help fight guerillas and the drug overlords who support them.