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WASHINGTON – The chiefs of five major oil companies defended the industry’s huge profits Wednesday at a Senate hearing where they were exhorted to explain prices and assure customers they’re not being gouged. There is a “growing suspicion that oil companies are taking unfair advantage,” Sen. Pete Domenici, R-N.M., said, …

WASHINGTON – Scientists have discovered a biological brake for a hunger hormone: a competing hormone that seems to counter the urge to eat. The substance, named obestatin, has been tested just in laboratory rats so far. But if it pans out, the discovery of the dueling hormones could lead not …

WASHINGTON – A growing number of Iraqi troop battalions — nearly four dozen as of this week — are playing lead roles in the fight against the insurgency, and American commanders have turned over more than two dozen U.S.-established bases to government control, officials said Monday. Those are among signs …