Depressurization and smoke alarms woke the shuttle and station crews for a second consecutive night on Friday. Flight controllers quickly determined they were false alarms, but the station's ventilation system automatically shut down, prompting NASA to cancel spacewalk preparations inside a low-pre...

U.S. Rep. Gabrielle Giffords' husband, Mark Kelly, is slated to command NASA's final planned shuttle flight, due to launch in April.

Dual countdowns are under way at the Kennedy Space Center in Florida today. The 3-day countdown to a shuttle launch and a 60-day countdown to heavy job losses for United Space Alliance's employees.

Concerns that its new model Soyuz spacecraft could run into problems during an untested flight plan, Russian space officials vetoed a NASA proposal to photograph the fully-laden space station.

A fuel tank from the crashed shuttle is found in a lake in drought-stricken Texas.

As Space Shuttle Atlantis left the space station, it remained uncertain when another U.S. spacecraft would return.

Caenorhabditis elegans worms, descendants from worms that survived the 2003 shuttle Columbia disaster, have just become the next generation to do science in orbit.

The 1986 Challenger accident, as well as the Columbia tragedy that followed 17 years later, could have been prevented. That's the uncomfortable truth NASA lives with today.