Correspondent Mary Stucky tells the story of maca. That's the name of a Peruvian root used as a libido-enhancer. Peruvian Indians discovered maca. But a US company analyzed and patented its active ingredient. Maca-based products could mean big bucks for the patent owners. But back in Peru, many wonder whether they'll see any of the profits.

The use of hospice care is growing in the United States, but not within the Hispanic community. Correspondent Sarah Bush reports from Austin, Texas.

The World's Jessie Graham reports on a program here in the United States that helps immigrants from several African countries cope with their memories of war back home. We hear how some American therapists are trying to overcome the immigrants' reluctance to talk about their traumatic experiences.

British researchers say they've successfully grown human heart tissue from stem cells. Scientists say it's a step toward the transplant of replacement heart valves or possibly one day a whole heart. The World's Jason Margolis has the story.

In South Africa, people infected with HIV can now buy life insurance. That change in business practice reflects a dramatic change in medical reality. Correspondent Amy Costello reports.

Public health experts say that migration between Mexico and the United States is fueling the spread of the AIDS virus south of the border. The World's Jori Lewis reports on efforts to address the problem.

Scientists at Johns Hopkins University have found that genetically-modified mosquitoes could help prevent the transmission of malaria. Anchor Lisa Mullins speaks with one of the researchers, entomologist Jason Rasgon.