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Two groups of scientists report that have successfully transplanted lab-grown cells to repair severely damaged corneas. Their findings appear in the journal "Cornea" and in tomorrow's New England Journal of Medicine. NPR's Wendy Schmelzer reports.

Treasury Secretary Lawrence Summers today urged Congress to approve the administration's request for $472 million, to provide debt relief to developing nations. Republican leaders in the House are refusing to approve the full amount and are holding out for reforms at the World Bank and International Monetary Fund, the institutions that manage the debt relief program. NPR's Kathleen Schalch has this story.

A company formed by Harvard genetics professor George Church, known for his pioneering work in genome sequencing and gene splicing, hopes to genetically resurrect woolly mammoths.

An investigation by the Seattle Post-Intelligencer revealed that the three major brands of crayons -- Crayola, Prand and Rose Art -- all contain asbestos. Linda talks with Andrew Schneider, who reported on the story for the Seattle newspaper.

Weekend Edition popular culture commentator Steven Stark addresses the impact of the internet and cable TV on the presidential campaigns.

The Russian leader will attend an upcoming regional meeting via teleconference, the Kremlin said. Putin said he got his second COVID-19 vaccine in April.

Led Zeppelin's Robert Plant and bluegrass star Alison Krauss teamed up recently for a joint album, Raising Sand. Critic Ken Tucker has a review.

NPR's Tom Gjelten reports that the Clinton administration is consulting with other Latin American nations with regard to possible punitive steps to be taken against Peru. The US sharply criticized Peru's government for not postponing Sunday's presidential runoff to deal with irregularities. A state department spokesman refused to say what steps, if any, the US is prepared to take against President Alberto Fujimori. Peru receives the most US aid in Latin America after Colombia, and is a close partner with Washington in fighting drug trafficking.

A new study shows more than half of young people say climate change makes them feel afraid, sad, anxious, angry, powerless and helpless. And government inaction in particular makes them worried.

Researchers estimate that children 19 and younger influenced half a trillion dollars worth of purchases in the U.S. last year. With that kind of buying power on the line, advertisers are eager for help in targeting the nation's youngest consumers. Increasingly, marketers are getting their intelligence from psychologists who use their expertise. NPR's Elaine Korry reports that now, some psychologists are calling for the practice to be banned.