"Achilles and the Tortoise" is a famous paradox proposed by the ancient Greek philosopher Zeno of Elea. In this thought experiment, the swift warrior Achilles races against a slow-moving tortoise. To make the race fair, the tortoise is given a head start. Zeno argues that Achilles can never overtake the tortoise because whenever Achilles reaches the point where the tortoise was, the tortoise has moved a little further ahead. This paradox illustrates the concept of infinite division, suggesting that motion and change are illusory. It challenges our understanding of space and time, prompting discussions about the nature of reality and the limits of human perception.