1.   Actually, scientists say that cloned animals will not be exact replicas of their progenitors.

2.   After that, hardly any scientists said life, even microbes, existed on Mars.

3.   Now, scientists say the inner core rotates slightly faster than the rest of Earth.

4.   Scientists have said there is no cause for alarm.

5.   Scientists say that the oil spill is an ecological catastrophe.

6.   Scientists say the oil spill is an ecological catastrophe.

7.   The finding could ultimately lead to a way to correct the genetic defect, scientists say.

8.   With luck, scientists say, some of the new gadgets could change our view of the universe.

9.   Scientists say there is no convincing evidence that power lines have anything to do with cancer.

10.   Closer at hand is the risk that interfering with genes before birth might culminate in a succession of serious birth defects, scientists say.