The Stone Age marks a period of prehistory in which humans used primitive stone tools. Lasting roughly 2.5 million years, the Stone Age ended around 5,000 years ago when humans in the Near East began working with metal and making tools and weapons from bronze. Paleolithic Period, also spelled Palaeolithic Period, also called Old Stone Age, ancient cultural stage, or level, of human development, characterized by the use of rudimentary chipped stone tools. The Mesolithic is the Old World archaeological period between the Upper Paleolithic and the Neolithic. The term Epipaleolithic is often used synonymously, especially for outside northern Europe, and for the corresponding period in the Levant and Caucasus. Neolithic, also called New Stone Age, final stage of cultural evolution or technological development among prehistoric humans. ... The Neolithic followed the Paleolithic Period, or age of chipped-stone tools, and preceded the Bronze Age, or early period of metal tools. Hominids are the group of primates that includes humans, gorillas, and chimpanzees, among others. The word hominid originally referred only to humans, and its Latin root reflects that: homo, or "man." Today scientists use it to talk about any of the great apes (including humans).
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who are the reference persons*
Answer:When the new Constitution was ratified, the Electoral College unanimously elected Washington President. He did not infringe upon the policy making powers that he felt the Constitution gave Congress. But the determination of foreign policy became preponderantly a Presidential concern.
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<span>Bolivar led revolutions in South American countries ending Spanish colonial rule there.</span>
Operant-conditioning is the process by which a response becomes more likely to occur or less so, depending on its consequences. Shaping is an operant-conditioning procedure in which successive approximations of a desired response are reinforced. shaping spontaneous recovery stimulus generalization stimulus discrimination . This process of establishing a behavior was first developed and used by B.F Skinner,
