Many fir trees in Mexico that provide winter homes for monarch butterflies are being killed by bark beetles.
The true story of a Chinese bus mechanic who risked his all in a symbolic challenge to China’s dictatorship.
Investors have redeemed $1.3 billion from troubled hedge firm Galleon.
Former Microsoft software developer Charles Simonyi flies during a parabolic flight aboard a zero-gravity simulator, a Russian IL-76 MDK aircraft used for astronauts' training flights in weightlessness, in Star City outside Moscow, on Feb. 26, 2007. As the world's fifth space tourist, Simonyi blasted off to the International Space Station on April 7, 2007.
The Amazon Rainforest is one of 28 sites picked as finalists in a global poll to name the New Seven Wonders of Nature, conducted by the Swiss nonprofit New7Wonders Foundation. The Brazilian Amazon, pictured here, harbors 40 percent of all remaining tropical rainforest, playing a vital role in global biodiversity and in protecting the earth's climate.
NASA's journey into the universe
Seedlings know when they're from the same plant, and wasps get smarter as they get tougher tasks, studies show
Northeast Passage through the Arctic slashes time and money for mariners and could be a boom for Russia. But it raises concerns about ice loss induced by global warming.
Fathima Rifqa Bary alleged that her Muslim father threatened to kill her after she converted to Christianity. The case has set Muslim and Christian activists at odds.