51.   Yet, Dr. Vincent Riccardi has a different theory.

52.   Each participant is bent on winning the Nissan Frontier, but everyone has a different theory on how to win, and who the toughest competitors will be.

53.   Mike Murphy, on his way to snowmobile north of here, has a different theory.

54.   The different theories -- as well as the public interest in the issue -- keep the rhetoric going.

55.   There are a number of different theories that are neither right or wrong, but are useful for different purposes.

56.   There were different theories that mosquitoes or other insects or rodents were to blame, Formenty said.

57.   Witnesses and investigators had different theories on what may have prompted the attack.

58.   But Jerome Brainerd of the University of Alabama had a different theory.