Developmental Psychobiology (DP) Has Traditionally Concerned Itself With Investigations Of The Biological Bases Of Behavior And How They Change During Development. Th E Rich Tradition Of DP Is Seen In The Many Advances It Has Provided To Our Understanding Of Behavior And Behavioral Development. Moreover, DP Has Been Distinguished By Its Adherence To An Epigenetic Perspective, That Is, A Perspective That Embraces All Contributions To Individual Development, From The Molecular To The Social. DP Remains A Productive And Innovative Discipline, But It Now Faces New Challenges Posed By Rapid Advances And The Advent Of Powerful Technologies In Molecular Biology, Neuroscience, And Evolutionary Biology. Th Ese Challenges, However, Are Also Opportunities.