Given the subject, consider asking /r/AskScience and /r/AskAnthropology as well. There was a fairly interesting thread recently in the latter subreddit recently.

Furthermore, try to clarify what you mean. Do termites, ants, bees, or other social insects count? Do chimpanzee or elephant behavior count as a "culture"? What do you mean by "human"? Do only Homo sapiens count? If so, the Neanderthals probably qulify. Or do you mean the entire Homo genus?