A bridgeis a structure built to span physical obstacles such as a body of water, valley, or road, for the purpose of providing passage over the obstacle. There are many different designs that all serve unique purposes and apply to different situations. Designs of bridges vary depending on the function of the bridge, the nature of the terrain where the bridge is constructed, the material used to make it and the funds available to build it.
they used rocks and mud and put them into a half circle from one side to the other.
Early civilizations used the solar portion of the 52 year calendar for planning farming seasons.
Early civilizations used the solar portion of the 52 year calendar for planning their farming seasons. One of the earliest civilizations to use the 52 year calendar was the Mexican civilization.
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Archaeologists have not found tin as a resource for weapons in their revealings and searches for the Early Civilization era so far. Back then most Civilizations would use copper or iron to create their weapons.
Early human civilizations used bows, arrows, spears, stone knives, and hand axes.
Early human civilizations used bows, arrows, spears, stone knives, and hand axes.
Among the earliest civilizations that exhibit the phenomenon of divinized. The first Mesopotamian ruler who declared himself divine was Naram-Sin of Akkad.
Fire, caves, stone tools, animal skins, and various methods of irrigation were wisely put to use by several early cultures.
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source to understand bronze age in early China
Hieroglyphics. These were used by both Mayan and Aztec civilizations but are no longer in use.