51.   Dini added there was no firm scientific proof that mad cow disease can transfer to humans.

52.   Defense lawyers say they believe the government now intends to make its case without scientific proof of a specific poison.

53.   He added there was no firm scientific proof that mad cow disease can transfer to humans.

54.   Harris County District Attorney John B. Holmes Jr. said that without scientific proof, there is no foolproof way to ensure the accuracy of witnesses.

55.   The court ruled there was insufficient scientific proof that the drug, bromantan, was a performance-enhancing stimulant.

56.   The court said it needed scientific proof that the substance involved was marijuana.

57.   The Guatemalan military says it has scientific proof the four were in Guatemalan territory.

58.   The Medical Council is considering legal action against a practitioner of alternative medicine who has been treating her patients without a medical degree or any scientific proof.

59.   The others note transgenic corn is likely growing in Mexico, but that scientific proof is still lacking.

60.   The U.S. government insists there is no scientific proof of a causal relationship.