British red squirrels are thriving on an island off the southern coast of England, safe from a deadly poxvirus carried by the more common North American gray squirrel.
The pressure on South African mining companies to dig deeper for remaining gold ore deposits may further endanger miners in an industry where accidents are commonplace.
Floods in southeastern Mexico have left thousands in serious need of food and water. Authorities are worried about the possible spread of waterborne disease.
Mexico's leader called flooding in Tabasco state "one of the worst natural disasters in the history of the country." Officials now fear waterborne disease.
Self-cleaning toilets and a 14-year-old inventor are part of this annual summit in India to address sanitation problems for 2.6 billion people without toilets.
The Nature Conservancy has blasted through 1950s-era levees in the Williamson River Delta in southern Oregon to save the wetlands and endangered fish species.
HIV came straight to Haiti from Africa, then traveled to the United States and much of the rest of the world, suggests a new study into the mysterious history of AIDS.
