Canada: The permafrost of the highest Arctic reaches of the Northwest Territories can make it difficult to inter the dead underground. The Inuvialuit and Inuinnait people of the region buried their dead above ground, covered with large flat stones. Archaeologists have recently documented four examples of these graves dating to either 700 years ago or the 19th century. The graves will be left undisturbed, but nearby sites, including food caches, will be examined to learn more about the cultures that made them.