I consider the concept of a global mean temperature to be somewhat dubious. A single number cannot adequately capture climate c hange. This number, as I see it, is aimed mostly at politicians and journalists. Craig F. Bohren More Quotes by Craig F. Bohren More Quotes From Craig F. Bohren You can swim (uncomfortably) in water at a temperature slightly above freezing; a tiny drop in temperature-or a miracle-allows you to walk on water. Craig F. Bohren miracle water science