31.   In addition to mtDNA evidence, researchers will look for circumstantial evidence.

32.   In experiments, the researchers looked at the effects of nicotine in several groups of mice.

33.   In the face of that prognosis, researchers are looking far and wide for new approaches.

34.   In this way, the researchers are looking for nongenetic forces that drive development and evolution.

35.   In the meantime, AIDS researchers are looking at the course of infections among wild animals and wondering what that course says about the future of human AIDS.

36.   Increasingly, researchers are looking for very small effects like a tiny edge in a battle against heart disease.

37.   In targeting the fosB gene, the researchers were not looking for a nurturing effect.

38.   In their search for causes, researchers are looking at alcohol, smoking, abortion, radiation, pesticides, electrical power, even artificial light as possible culprits.

39.   Instead, researchers look for treatment of violence that is not overly graphic, that addresses its consequences and that is relevant to the plot.

40.   Kieburtz said researchers are looking at other therapies, such as vitamin E and other anti-oxidants to deter brain tissue damage.