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   This legal code, created by King Hammurabi of Babylon, is one of the earliest known sets of written laws in history. This legal code, created by King Hammurabi of Babylon, is one of the earliest known sets of written laws in history.
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   Also known as a clepsydra, this device was used to measure time by the controlled flow of water. It had various applications in ancient societies. Also known as a clepsydra, this device was used to measure time by the controlled flow of water. It had various applications in ancient societies.
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   The development of iron plows improved agriculture by making it more efficient and allowing for better soil cultivation. The development of iron plows improved agriculture by making it more efficient and allowing for better soil cultivation.
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   Attributed to the Greek mathematician Pythagoras, this theorem relates to the lengths of the sides of a right triangle. Attributed to the Greek mathematician Pythagoras, this theorem relates to the lengths of the sides of a right triangle.
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   While the exact origin of the compass is debated, it was in use by the Chinese around this time and greatly aided in navigation. While the exact origin of the compass is debated, it was in use by the Chinese around this time and greatly aided in navigation.