Animal culture involves the current theory of cultural learning in non-human animals, through socially transmitted behaviors. The question as to the existence of culture in non-human societies has been a contentious subject for decades, largely due to the lack of a concise definition for the word "culture". However, many leading scientists agree on seeing culture as a process, rather than an end product. This process, most agree, involves the social transmittance of novel behaviour, both among peers and between generations. Such behaviour can be shared by a group of animals, but not necessarily between separate groups of the same species.