31.   Many new drugs in development are precisely aimed at the abnormalities that make cancer different form normal tissue.

32.   One thing that makes cancer different from normal tissue is that it refuses to die.

33.   One unknown, Scheinberg said, is the effect the nanogenerator might have on normal tissue.

34.   The elastin is dyed green to absorb the infrared laser, which passes through normal tissue without damage.

35.   The goal is to expand its idea of what normal tissue in the body looks like, so that a donated organ appears to be an old friend.

36.   The mold disintegrated within three months, replaced by normal tissue.