Information about the policies and procedures that govern these programs may be obtained from the appropriate NPS program managers (who are generally located in The Department of the Interior protects and manages the nations natural resources and cultural heritage; provides scientific and other information about those resources; and honors its special responsibilities to American Indians, Alaska Natives, and affiliated Island Communities.
This direction may be general or specific; it may prescribe the process through which decisions are made, how an action is to be accomplished, or the results to be achieved.
Policy initiatives may originate as a sudden, urgent response to an unanticipated problem or issue, or through a slow, evolutionary process as the Park Service gains increased experience or insight regarding a problem or issue.
Estimating a date of mixture of ancestral South Asian populations Linguistic and genetic studies have demonstrated that almost all groups in South Asia today descend from a mixture of two highly divergent populations: Ancestral North Indians (ANI) related to Central Asians, Middle Easterners and Europeans, and Ancestral South Indians (ASI) not related to any populations outside the Indian subcontinent.
ANI and ASI have been estimated to have diverged from a common ancestor as much as 60,000 years ago, but the date of the ANI-ASI mixture is unknown.