I've been reading a lot of Native American mythology, and I've noticed that horses play a prominent role in several stories. For example:
Looking around, she saw a great white horse with black eyes. He had a long white mane, and he pranced above the ground, not on the earth itself. She saw that the bridle was white too, and that the saddle was white. And there was a young man sitting on the horse. The young man's moccasins and leggings and clothing were all white.
What surprised me is that horses are not native to North America, but were brought over by Europeans:
The disappearance of the horse from the Western Hemisphere for 10,000 years supports the position that today's American wild horses should not be considered "native." American wild horses are descended from domestic horses, some of which were brought over by European explorers in the late 15th and 16th centuries, plus others that were released or escaped captivity in modern times. Over this 500-year period, these horses (and burros) have adapted successfully to the Western range.
If horses are not native to America, how and why did they become integrated in Navajo (and other Native American) mythology? And why aren't other European artefacts, like guns, integrated the same way? I can't find any stories where non-Europeans use guns, but horses seem to have been absorbed into the culture so much that it features prominently in the Navajo creation myth.