When you get into the whole field of exploring, probably 90 percent of the kinds of organisms, plants, animals and especially microorganisms and tiny invertebrate animals are unknown. Then you realize that we live on a relatively unexplored plan. ↗
Right now, any opinion anyone has about whether dogs can or cannot really tell when their owner is coming home by some unknown means... nobody knows. The weight of evi dence suggests they can. ↗
For though we often need to be restored to the small, concrete, limited, and certain, we as often need to be reminded of the large, vague, unlimited, unknown. ↗