Cultural evolution can be as a progression.Logical formLearned from1 sentences. A progression can be toward design.Logical formLearned from1 sentences. Directions can be part of a progression.Logical formLearned from1 sentences. Discoveries may produce material evidence of a progression.Logical formLearned from1 sentences. Progression can be toward adulthood.Logical formLearned from1 sentences. Progressions can be curious.Logical formLearned from1 sentences. (X-ray films) may show progression.Logical formLearned from1 sentences. Progressions can be infinite.Logical formLearned from1 sentences. The past may undergo progressions.Logical formLearned from1 sentences. A person may provide an observer with an (eye progression).Logical formLearned from1 sentences.