41.   But it can be difficult to put any new findings into clinical practice.

42.   But just last month in the journal Science, two biologists said new findings cast doubt on the dino-bird theory, and debate is raging anew.

43.   But new findings being provide strong evidence that human heart muscle cells do regenerate after a heart attack.

44.   But new findings provide strong evidence that human heart muscle cells do regenerate after a heart attack.

45.   But new findings show that girls have surpassed boys in most of the technical classes offered in middle school and high school.

46.   But new findings indicate that in the case of dinosaurs, just such a collision may have also permitted their rise to power.

47.   But such judgments are always subject to change should new scientific findings emerge.

48.   But no evidence has refuted it, and new findings make it more difficult to find a nonbiological explanation, several scientists said.

49.   But nothing about the new findings explains the purpose of the mounds, one of the nagging mysteries in American archeology.

50.   But researchers, including the authors, emphasized that the new findings did not mean that all biotech crops would be environmentally benign either.