In Central America's sugarcane field, more and more workers are coming down with a disease that shuts down their kidneys. Researchers are struggling for a cause. Chemicals on the fields? Heat? Overwork? No one knows, but it's a leading cause of death for men in El Salvador and Nicaragua.
As the price of gold stays at record high levels, it's caused a resurgence in the mining industry in Nicaragua. One of the Western Hemisphere's poorest countries, it's enjoyed the greatest growth in GDP in recent years because of gold mining.
An epidemic, the disease chytrid, is spreading among the world'a amphibian population, decimating whole species. Now, scientists are building arks in an effort to save species before the disease can wipe them out.
Migratory birds, like the endangered whooping crane, are struggling because their typical wintering grounds are gripped by a drought that's reduced their habitat and food supplies. But favorable conditions elsewhere may help them survive in places like Nebraska.
El Salvador has the world's second highest murder rate. More than 4,300 occurred there last year alone. Though the U.S. has poured millions of dollars into anti-gang efforts in the country, nothing seemed to change until a few months ago when the Catholic Church stepped in.