How long did each Stone Age last?

The Stone Age is divided into three distinct periods: the Paleolithic (Old Stone Age), which lasted from about 2.5 million years ago to 10,000 BCE; the Mesolithic (Middle Stone Age), from about 10,000 BCE to 5,000 BCE; and the Neolithic (New Stone Age), from about 5,000 BCE to the advent of the Bronze Age around 2,000 BCE.