The ancient Egyptians also left a legacy of monumental writing and mathematics systems.
The ancient Egyptians also left a legacy of monumental writing and mathematics systems. The cubit, a measure of length roughly the span of a forearm, was key to designing the pyramids and other structures. They developed the 24-hour day and 365-day calendar during this time. And they established the hieroglyphic pictorial writing system, followed by the hieroglyphic system that used ink on papyrus paper. The civilization came to an end in 332 B.C. when it was conquered by Alexander the Great.