Stone tools are the oldest traces of human activity. The theories of the origin of humans vary widely and have been at the center of heated debates for hundreds of years. Despite our modern technology and advances in the sciences, concrete evidence is still lacking to prove any of these theories. Creationists believe that man was simply created in a modern form and did not evolve from more primitive creatures. Those subscribing to the belief in evolution believe that man's beginning is founded in early mammalian evolution. Certain lizards evolved into mammals, those mammals gave rise to apes and monkeys and finally, man emerged from these primates through a progression of species leading to modern man, Homo sapiens. Finally, some subscribe to a hybrid theory as a combination of these two - man was created as "man" and went through a series of developmental changes. Theories aside, we all cannot argue the existence of prehistoric humans as we DO have concrete evidence from the presence of campsites, tools and artifacts that date back as far as over two million years and have been found throughout the world.

One of the most important artifacts of primitive man is the existence of stone tools. The PALEOLITHIC Period is defined as the time from the first use of stone tools around two million years ago to the Pleistocene Period, 12,000 years ago. The Paleolithic Period is divided into three categories, Lower, Middle and Upper Paleolithic Period. Four basic traditions (and time periods) of their manufacture have been identified:

• OLDOWAN / DEVELOPED OLDOWAN (2 million to 1.5 million years ago)

• ACHEULIAN (1.5 million to 150,000 years ago)

• MOUSTERIAN or MIDDLE STONE AGE or MIDDLE PALEOLITHIC (200,000 to 30,000 years ago)

• LATE STONE AGE or UPPER PALEOLITHIC (30,000 to 10,000 years ago)

Scientific record and evidence places the beginning of the genus HOMO at two million years ago with the emergence of Homo habilis from East and Southern Africa. This species is the earliest known record of man that is categorized in the same group as living humans. It was at this point in time that stone tools first appearedand they are classified as the OLDOWAN / DEVELOPED OLDOWAN Tradition. Homo habilis represents a remarkable change in the comparison of other earlier species believed to be more primitive forms of humans. Up to this point in time, Africa is the only location in the world for human existence.

At 1.75 million years ago,Homo erectus (a.k.a. Homo ergaster) appears and spreads throughout North Africa eventually traveling to Eurasia. Homo erectus (other H. erectus variants includeHomo ergaster, Homo heidelbergensis) survived for 1.5 million years in Africa and Asia. They were active hunters that lived in small huts and caves, mastered the use of fireand fashioned a variety of stone tools. These bifacial stone tools were different from the Oldowan tools as they were fashioned out of large flakes and occur in greater abundance and variety. Thischange in tool development first occurs 1.4 million years ago and is classified as theACHEULIAN TRADITION.

From 500,000 years ago to 250,000 years ago, Homo erectus was transitioning into an archaic form of Homo sapiens in Africa and Europe. True Homo erectussimultaneously existed at this time only in Northern Africa and China but eventually disappears from the fossil record 250,000 years ago leaving Homo sapiens as the only human species left on the planet. The most famous variety of archaic Homo sapiens is undoubtedly the Neanderthal people. Perhaps no other type of primitive man has been so maligned as that of the Neanderthals and recent discoveries are sending many scientists back to their proverbial drawing boards to rewrite an accurate account of these amazing peoples. Scientists now classify them as a sub-species of Homo sapiens, Homo sapiens neanderthalensis. With the emergence of Neanderthals comes a new, more advanced and specialized tool technology called the MOUSTERIAN TRADITION.

While signs of developing Neanderthals arose 300,000 years ago, true Neanderthals can first be attributed back to 150,000 years ago. They populated regions in Europe and the Near East, and existed right up to just 30,000 years ago in western France. Between 125,000 and 100,000 years ago, the Neanderthals spread east and south, andthey are known in northern Africa and from France through southern Europe, the former southern Soviet states and Iraq. Current evidence shows that despite Neanderthals' stockier build, they share several key features with modern man. There is also clear evidence that they had control of fire, lived in caves or open-air structures of stone and vegetation.

A vast amount of information can be gained from the study of Paleolithic tools. The examination of their potential uses as well as changing designs provides not only a wealth of information as to the daily life of primitive man but also exhibits the advancement and development of the human species as a whole.

To hold a prehistoric stone tool in your hand is an awe-inspiring experience when one realizes that a primitive human personally created the tool specifically for their own needs and held that same tool in their hand, relying upon its use for their very subsistence.