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NASA mission controllers have not heard from the Mars Exploration Rover Spirit since March 22, and the rover is facing its toughest challenge yet -- trying to survive the harsh Martian winter.

American and Canadian scientists are setting sail this summer to map the Arctic seafloor and gather data to help define the outer limits of the continental shelf.

In the aftermath of Hurricane Katrina, hospitals were overwhelmed and understaffed. As hallways were flooded with patients, many of whom had life-threatening injuries and illnesses, the lack of proper supplies became apparent.

For the first time, NASA scientists have produced a map of the height of the world's forests by combining data from three satellites.

Talk about a growth-spurt. In one week, Curiosity grew by approximately 1 meter (3.5 feet) when spacecraft technicians and engineers attached the rover's neck and head (called the Remote Sensing Mast) to its body. At around 2 meters (about 7 feet) tall, the next rover to Mars now stands head and shoulders above the rest.

A small impact crater discovered in the Egyptian desert could change estimates for impact hazards to our planet, according to a new study.

Scientists in Canada have spotted the largest molecules existing in space called buckyballs.

The biggest star, with a mass 320 times greater than the sun's, has been discovered at the edge of our galaxy by British astronomers.

Five experts provided insight into the origins and progress of the Boeing (NYSE: BA) 787 Dreamliner program at the Farnborough International Airshow Tuesday.

An array of previously 'invisible' space objects have been discovered by one of NASA's newest space telescopes, the Wide-field Infrared Survey Explorer (WISE), in just six months.