Costa Rica's natural splendor, coastal beauty, and laid-back attitude have transformed it into an ecotourism hotspot. It also happens to get 94 percent of its energy supply from renewable sources: wind, solar, biomass, and hydropower among them.
In the week before the release of his documentary, The 11th Hour, Leonardo DiCaprio spoke with senior editor Laura Wright from his home in Los Angeles about why he made the film.
How does the environment affect our DNA? Using a new generation of powerful genetic tools, scientists are finding unexpected answers that could revolutionize our understanding of the causes and prevention of disease.
Wall Street analysts are thrilled by the discovery of vast new oil fields deep beneath the Gulf of Mexico. But the oil companies will have to cope with the threat of hurricanes and underwater earthquakes.