1.   Scientists have long wondered which parts of the brain are involved in musical tasks.

2.   And scientists are wondering aloud whether certain experiments should not be done or certain results not published because they will help others design weapons.

3.   But because the bacterium is present in many people who never develop cancer, scientists have wondered what role it may play in the disease.

4.   But scientists wondered how to prove the hypothesis.

5.   But, scientists have long wondered, how quickly can reproductive isolation evolve?

6.   Even before the polls opened, political scientists were sadly wondering why so many New Yorkers were not going to vote Tuesday.

7.   For decades scientists have been wondering where all the mass in the universe is that their equations tell them exist.

8.   For years scientists have wondered how far they can push the limits of computation.

9.   How many, scientists wonder, die after their release because of the bruising, crowded ride downstream in barges?

10.   If organisms are inherently selfish, and supposedly devoted to personal survival and reproduction, why, scientists wondered, do so many species display seemingly self-sacrificial behavior?