Ignition Component fuel moisture (FFM) which expresses the effective moisture content of the fine fuels. The closer the initial temperature of the fuel is to the ignition temperature, the more likely a fire will result when a firebrand in introduced into the fine fuel complex, since not a much energy is required to raise the fuel particle to its ignition temperature. Ignition Component The Ignition Component is a number which relates the probability that a fire will result if a firebrand is introduced into a fine fuel complex. The ignition component can range from 0 when conditions are cool and damp, to
Archaic humans of over 120 individuals. Dunbar argues that it was not possible for hominins to live in such large groups without using language, otherwise there could be no group cohesion and the group would disintegrate. By comparison, chimpanzees live in smaller groups of up to 50 individuals. Archaic humans A number of varieties of "Homo" are grouped into the broad category of archaic humans in the period contemporary to and predating the emergence of the earliest anatomically modern humans ("Homo sapiens") over 315 ka. The term typically includes "Homo neanderthalensis" (430+–38ka), "Denisovans", "Homo rhodesiensis" (300ka–125ka), "Homo heidelbergensis" (600ka–200ka), and "Homo antecessor".