Will tribal knowledge survive the millennium?

As we begin a new millennium and contemplate how our current understandings might be evaluated in 1000 years, it may be useful to look backward. What pieces of knowledge do we treasure that come from 1000 years ago? Accounts from the end of the last millennium herald innovations like the metal plow but were imbued with folk knowledge from an era when trolls, fairies, and personifications of the elements, such as Jack Frost, were thought to play important roles in determining the course of human life.