1.   A new study proved conclusively that smokers die younger than non-smokers.

2.   His two-year study could prove that volcanos will have an explosive part to play in fighting global warming.

3.   Although some scientific studies have proved the benefits of manipulative therapy for spine problems, evidence that it helps other diseases is sparse.

4.   And one still profits, most students and administrators agree, if foreign study proves no better than a break-even financial proposition.

5.   Anti-smoking advocates say the study proves tobacco companies are targeting the youth market, despite claims to the contrary.

6.   Aston said the study proved that the more limited face-lift procedure could do just as well.

7.   But heart disease experts cautioned that the study did not prove an effect and some questioned the findings.

8.   But he and others said the latest study proves that Seattle has no stumbling blocks that would prevent the Games from coming to the Northwest for the first time.

9.   But no studies have proven it adds muscle mass, Yesalis said.

10.   But now, as researchers enter unexplored territory, the previous studies are proving inadequate to address the anthrax problem confronting the nation.