Investigators Consider Possible Causes of Shuttle Disaster

NASA investigators have come up with several theories of what could have caused the destruction of the space shuttle Columbia. They're currently considering whether a block of ice formed on the shuttle's wing while it was in space. This could have broken off during re-entry and damaged the spacecraft. Another theory suggests that the shuttle collided with a piece of orbital debris.

Fraser Cain

Fraser Cain

Fraser Cain is the publisher of Universe Today, founding the website in March 1999. He's also the co-host of Astronomy Cast.