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Hace 1 día · Arch. Gateway Arch. An arch is a curved vertical structure spanning an open space underneath it. [1] Arch can either support the load above it or perform a purely decorative role. [2] The arch dates back to fourth millennium BC, but became popular only after its adoption by the Romans in the 4th century BC.
Hace 1 día · 6th millennium BC: Irrigation in Khuzistan, Iran; 6000 BC - 3200 BC: Proto-writing in present-day Egypt, Iraq, Romania, China, India and Pakistan. 5500 BC: Sailing - pottery depictions of sail boats, in Mesopotamia, and later ancient Egypt; 5000 BC: Copper smelting in Serbia; 5000 BC: Seawall in Tel Hreiz.
Hace 1 día · Geometry problem on a clay tablet belonging to a school for scribes; Susa, first half of the 2nd millennium BCE. In contrast to the sparsity of sources in Egyptian mathematics, knowledge of Babylonian mathematics is derived from more than 400 clay tablets unearthed since the 1850s.
Hace 1 día · 1975 was a common year starting on Wednesday of the Gregorian calendar, the 1975th year of the Common Era (CE) and Anno Domini (AD) designations, the 975th year of the 2nd millennium, the 75th year of the 20th century, and the 6th year of the 1970s decade.
Hace 3 días · During the 2nd millennium, the use of true bronze greatly increased. The tin deposits at Cornwall, England, were much used and were responsible for a considerable part of the large production of bronze objects during that time. The age was also marked by increased specialization and the invention of the wheel and the ox-drawn plow.
Hace 3 días · In the late Bronze Age, from the late 2nd millennium to the early 1st millennium BC, a fourth wave, the Proto-Villanovan culture, brought iron-working to the Italian peninsula.
Hace 2 días · The history of Vietnam can be traced back to around 20,000 years ago. The first modern humans to arrive and settle in the area of modern-day Vietnam are known as the Hoabinhians, who can be traced as the ancestors of modern-day Negritos. Archaeological findings from 1965, which are still under research, show the remains of two hominins closely ...
