Classical element to use the term "element (στοιχεῖον, "stoicheion")" in reference to air, fire, earth, and water. The ancient Greek word for element, "stoicheion" (from "stoicheo", "to line up") meant "smallest division (of a sun-dial), a syllable", as the composing unit of an alphabet it could denote a letter and the smallest unit from which a word is formed. A similar alphabetic metaphor may be the origin of the equivalent Latin word "elementum" (from which the English word comes), possibly based on the names of the letters 'l', 'm', and 'n', though the validity of this idea is debated. In his "On
Archaic humans In this case the standard taxonomy is used, i.e. "Homo rhodesiensis", or "Homo neanderthalensis". The evolutionary dividing lines that separate modern humans from archaic humans and archaic humans from "Homo erectus" are unclear. The earliest known fossils of anatomically modern humans such as the Omo remains from 195,000 years ago, "Homo sapiens idaltu" from 160,000 years ago, and Qafzeh remains from 90,000 years ago are recognizably modern humans. However, these early modern humans do possess a number of archaic traits, such as moderate, but not prominent, brow ridges. The emergence of archaic humans is sometimes used as an example of