There seems to be a lot of symbolism attached to the kurgans. They are located at the same latitude as Stonehenge, may have had standing stones on top of the kurgans themselves, marking the locations of prominate constellations in the cardnal & secondary directions. Also the three rings that create each kurgan representing the sacred mountain, sun, and moon, essentally creating a heavenly earth on earth. The sacred mountain being the dwelling of the hunted hunter (the deceased). But as the constellations promise the renewal of life, so too does death turn to life.