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The head of U. S. carrier Spirit Airlines Inc. has said that luggage is "not essential" to travel, so paying $45 to place carry-ons overhead helps bag-free people fly.

Chief Executive Officer Ben Baldanza told the U. S. House Transportation Committee on Wednesday, "We are certain that Spirit's decision to unbundle services not essential to the transportation of passengers has enabled more passengers to fly at lower cost. Indeed, given our low fares, it has allowed many to travel who otherwise simply could not afford to do so."

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U. S. researchers have suggested that men with an initial prostate-specific antigen of 10 or higher were 11 times more likely to die of prostate cancer.

Their findings support routine, early PSA screening for healthy men, researchers at Duke University Medical Center in Durham, N. C., have said.

U. S. researchers say memory capacity may also help in significant way to student musicians.

It has been reported that researchers Elizabeth Meinz of Southern Illinois University in Edwardsville and David Hambrick of Michigan State University in East Lansing find the amount of time a person spends practicing explains about 45 percent of the variance in sight-reading skill. However, they say working memory capacity is also important.

According to the reports, raw milk gets a raw deal from health and agricultural officials, say proponents who contend its benefits outweigh the risk of drinking unpasteurized milk.

According to Sally Fallon Morell, president of the Weston A. Price Foundation in Washington and founder of "A Campaign for Real Milk," most investigations blaming raw milk for making people sick "are highly biased and never proved raw milk actually caused the illnesses." She says that other foods such as chicken and seafood pose a much greater danger.

According to the official reports, U. S. researchers say they are on the trail of a faster, easier test to detect pre-diabetes, long before symptoms occur and in time to reverse the disease.

It was found by Biochemists at Johns Hopkins School of Medicine in Baltimore, led by Gerald Hart that high amounts of a difficult-to-detect sugar, O-GlcNAc, occur in reaction to diet and stress in those with diabetes.