sentences:  In his study of treatment of hair and nails among the Indo-Europeans, Bruce Lincoln compares Snorri's "Prose Edda" comments about nail disposal to an Avestan text, where Ahura Mazdā warns that daevas and xrafstras will spring from hair and nails that lay without correct burial, noting their conceptual similarities.Lincoln comments that "the specific image of Naglfar, the 'Nail-ship', is undoubtedly specific to the Germanic world, although it does date to an ancient date within that area.But the basic idea on which it is based – that the improper disposal of hair and nails is an act which threatens the well-being of the cosmos – does ascend to the Indo-European period, as can be seen from comparisons [with Iranian myth]."