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Found in great numbers across Europe and Asia, microliths are very small blades made of flaked stone. Produced primarily during the Mesolithic Period, or Middle Stone Age, they were probably put to use in hunting and fishing weapons. Some could have been used as sharp tips for projectiles such as spears or arrows, while others may have been set together as teeth on harpoons. How do archaeologists distinguish microliths—which are typically shorter than the tip of a finger—from ordinary rocks? Discuss
Source: The Free Dictionary