Museums are facing challenges complying with the Native American Graves Protection and Repatriation Act (NAGPRA) by removing or covering displays of cultural sensitivity. The act allows tribes to make claims for ancestral remains and objects held by institutions, with a timeline for responses and decisions. Previously, museums could claim items as culturally unidentifiable. The new regulations require museums to give more deference to tribes' histories. Harvard University has a significant number of ancestral remains due to aggressive collecting practices in the 1800s and resistance to NAGPRA compliance, influencing other institutions.