Beijing smog reaches an all time high, prompting the government to speak out.
NASA has awarded a $17.8 million contract to Bigelow Aerospace to deliver an inflatable extension for the space station.
Nearly 800 people armed with guns and knives set out on Saturday to hunt down one of the most dangerous predators in the Florida Everglades: the Burmese python.
Merck & Co Inc has recalled its new cholesterol drug after finding that its side effects far outweighed its benefits.