61.   Despite the mea culpas, human behavior has not changed.

62.   Dr. Fred Simmons Keller, an analyst of human behavior and professor emeritus of psychology at Columbia University, died Friday at his home in Chapel Hill, N.C.

63.   Dopamine has been shown to be a key modulator in an astonishing array of human behaviors.

64.   Drawing on research in cognitive psychology, he used mathematical formulas to incorporate into theory the view that human behavior responds to fairness and reciprocity, not just self-interest.

65.   Dre Wapenaar, a Dutch artist who is practically unknown in the United States, believes that a properly designed tent can alter human behavior.

66.   Director Holland knows his way around a goofy situation, but grounds most of his comedy in the very real foibles of human behavior.

67.   Ecologists are warning that disaster lies ahead if human behavior does not change.

68.   Eco, who has more to say about America than most Americans, talked about the O.J. trial and how television is changing human behavior.

69.   Elaborate models written in computer languages such as Lisp and Prolog were incapable of emulating the simplest kinds of human behavior.

70.   Ever since early civilizations began shaping it into tools and ornaments, gold has influenced human behavior like few other substances.