  This toy example illustrates a further route by which language might  have evolved in human beings. In addition to creating inborn  language-learning mechanisms in individuals, natural selection may  also have created dispositions to construct particular kinds of  linguistic learning environments in their parents.  For example, as Clark (1996) and Sterelny (2003) both speculate,  Mother Nature might have worked on our dispositions to use  ‘Motherese’ to our children, and/or on our tendency to  talk about things that are current objects of the child's perceptual  attention, in order to create learning environments conducive to the  acquisition of language.