The case forces the court to reconsider the line between a student's right to free expression and a principal's authority to limit what is said and done at school.

The message seemed designed to provoke Principal Deborah Morse, and it succeeded in doing so. She tore it down and sent Frederick to the office. She planned to suspend him for five days, but when he invoked Thomas Jefferson and the First Amendment, she doubled the suspension to 10 days.

Several religious-rights groups filed briefs supporting the student's free-speech right in this case. Their lawyers worry that school officials might, for example, say it was inappropriate for a student to wear a T-shirt that praised Jesus Christ.

Gray, 63, of San Francisco, was last heard from on Sunday, the day he set out from San Francisco for the Farallon Islands, about 25 miles west of the Golden Gate Bridge. ... Coast Guard spokeswoman Lt. Amy Marrs called Gray's disappearance a mystery because the weather was good, he was in good health and the boat was equipped with radios and flares. There were no distress signals.

James Kim was a senior editor covering digital audio who also co-hosted a weekly video podcast for the Crave gadgets blog. He had been writing a book on Microsoft's Zune MP3 player. Formerly, he was an on-air personality on the now-defunct cable television network TechTV.

The hand-operated mechanism, presumably used in preparing calendars for planting and harvesting and fixing religious festivals, had at least 30, possibly 37, hand-cut bronze gear-wheels, the researchers said. A pin-and-slot device connecting two gear-wheels induced variations in the representation of lunar motions according to the Hipparchos model of the Moon's elliptical orbit around Earth.

"If a person exceeds that on one particular day and happens not to use their headphones for the rest of the week, they're at no higher risk," Fligor told Reuters. "I'm talking about someone who's exceeding 80 per cent for 90 minutes day after day, month after month, for years."

"From Sept. 21 to 30, the average area of the ozone hole was the largest ever observed, at 10.6 million square miles," said Paul Newman, atmospheric scientist at NASA's Goddard Space Flight Center, Greenbelt, Md. That's larger than the area of North America.

"With its upcoming Vista operating system, Microsoft is embracing the flawed logic that computers will be more secure if it stops co-operating with the independent security firms".