 As more and more non-DNA replicators, including epigenetic inheritance, are acknowledged, Dawkins’ view began to grade into the conception of the Extended Replicator, which Sterelny et al. (1996) specify as any non-genetic as well as genetic replicators where “genetic” refers to DNA. These two views are so general that any case that can be described in one can be redescribed in the other. Differences lie in ease of description. According to Sterelny et al. (1996), the burrows that some organisms dig can function as replicators—extended replicators—while Dawkins portrays them as instances of extended phenotypes. The contrast is between selfish burrows and selfish genes for burrowing.