1.   And skeptics doubt whether the hormone, or any other anti-aging treatment, can really stop the effects of getting older.

2.   A skeptic doubted they were, but was always willing to be surprised.

3.   But skeptics doubted Earth ever rotated fast enough to spin off the moon.

4.   But some skeptics doubt that protecting against six strains, or serotypes, is enough.

5.   But skeptics doubt it will happen that way, if recent Sino-American tensions are any guide.

6.   Even with that acquittal, the skeptics doubted that Fabius would again seize the political spotlight.

7.   Many skeptics doubt the single currency will ever be issued.

8.   Only a few weeks ago, skeptics doubted that even these inspections would go forward.

9.   Skeptics doubt that reform will make a very big difference in the way pensions are managed in France.

10.   Skeptics doubt whether the hormone, or any other anti-aging treatment, can really stop the effects of getting older.