The Upper Paleolithic is a period in prehistory that lasted from about 50,000 to 10,000 years ago. It is characterized by the development of modern human behavior, including advanced tool-making techniques and the creation of art. During this time, early humans, known as Homo sapiens, began to create intricate tools from materials like stone, bone, and antler. This era also saw the emergence of symbolic expression, as evidenced by cave paintings and carvings found in various locations, such as Lascaux in France and Altamira in Spain. The Upper Paleolithic was a time of significant cultural and technological advancements, marking a crucial phase in human evolution.