Radiometric dating activity answers
In his work on biology, he avoided the effort to treat biological entities by the use of rigid formal logic, and, though he made some inevitable errors in fact, his pragmatic approach has served as a model for biological observation ever since.
From long before the time of the ancient Greeks, human beings were generally recognized as members of the animal world.
Humans also lack the fur coat that all other primates possess, and, relative to body size, human brains are nearly three times as large as those of the apes.
Finally, all human groups are completely dependent on the use of language, without which they could not survive, and there is nothing comparable among their nearest nonhuman kin.
Obviously, females are of equal importance to the survival of the human species, and, somewhat belatedly, the field of biological anthropology has come to realize that males and females require equal attention if the phenomenon of humankind and how it emerged from its nonhuman predecessors is ever to be understood.
It came as something of a surprise when scientists determined that human beings share almost 99 percent of their genetic material with chimpanzees.
Although the archaeological and anatomical record does provide us with some indirect clues by which the answers to such questions can be suggested, those answers are only tentative.Since the records for prehistoric human existence are found underground, the most fundamental archaeological procedure is excavation--the essence of the archaeological dig. Local residents, farmers, or workers who happen upon prehistoric tools will often alert archaeologists to an area of promise for systematic investigation.Overlying soil is removed, with care being taken to note its natural layers and the exact position of each object and artifact discovered in the process.This led one scientific journalist to refer to humans as "the third chimpanzee." Despite all that is held in common, however, the differences are crucial and allow humans to be allotted their own genus and species, Homo sapiens.Human feet have lost their grasping capabilities and clearly reflect the fact that humans are characteristically bipedal while chimpanzees and all of their other relatives are characteristically quadrupedal as well as being more clearly adapted to tree-climbing as part of their normal way of life.