Which group is historically known for discarding their deceased to be consumed by dogs outside city walls?

The Mongolians are historically recognized for their unique funerary practice of leaving their deceased outside city walls to be consumed by dogs, particularly vultures and other scavengers. This practice aligns with their nomadic lifestyle and beliefs about the afterlife, which prioritized a connection with nature and the cycle of life and death. In this tradition, the body is not buried but rather returned to the earth through natural decomposition, which is in harmony with their cultural values.

The other groups listed have different burial customs. For instance, Herodotus, a historian, does not represent a specific group known for such practices. The Babylonians had established burial rites involving interment, and the Peruvians practiced mummification and burial in tombs. Therefore, the Mongolian tradition of exposing the dead aligns most closely with the practice described in the question.