An independent board investigating the breakup of the space shuttle Columbia released its final report Tuesday morning.
President Bush announced Monday that his choice to head the Environmental Protection Agency is Utah Governor Mike Leavitt, a Republican and an advocate of shifting environmental regulation to the states.
Scientists have identified a gene that plays a key role in whether prostate cancer spreads to other parts of the body or remains in the gland, where it is much less likely to cause harm, a study published Wednesday said.
Christine Todd Whitman, head of the Environmental Protection Agency, is leaving her post after more than two years.
NASA engineers worried a day before the Space Shuttle Columbia disintegrated upon re-entry that the shuttle's wing might burn through, leading to a breakup of the craft -- a message they did not communicate to senior NASA officials.
Days before the space shuttle Columbia disintegrated a NASA official warned that damage sustained during takeoff may have been enough to allow super-heated air to breach its left landing gear door.
NASA Administrator Sean O'Keefe on Wednesday told a congressional committee that he could not yet determine what caused the space shuttle Columbia to break up during re-entry on Feb. 1, but said investigation efforts are continuing.
Hundreds of police and soldiers continued their search for wreckage from the Space Shuttle Columbia Monday, covering a growing debris field that cut a swath more than 100 miles long and 10 miles wide across east Texas and Louisiana.
The space shuttle Columbia disintegrated upon re-entry over Texas Saturday morning moments before its seven-member crew was scheduled to land in Florida.
By PBS NewsHour
The following is the text of a NASA statement on the loss of the Space Shuttle Columbia.
Support Provided By: Learn more
Educate your inbox. Subscribe to ‘Here's the Deal,’ our politics newsletter
Support for Science Provided By: