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When Was The Wooden Pencil Invented

William Monroe, a Concord, Massachusetts cabinet-maker, is credited with making America’s first wood pencils in 1812. This method of manufacture, which had been earlier discovered by the Austrian Joseph Hardtmuth, the founder of the Koh-I-Noor in 1790, remains in use. In 1802, the production of graphite leads from graphite and… 

When Was The Sicilian Expedition

The Sicilian Expedition was an Athenian military expedition to Sicily, which took place from 415–413 BC during the Peloponnesian WarPeloponnesian WarThe Peloponnesian War (431–404 BC) was an ancient Greek war fought between the Delian League, which was led by Athens, and the Peloponnesian League, which was led by Sparta.https://en.wikipedia.org ›… 

When Was The Silurian Period

The Silurian (/sɪˈljʊəriən, saɪ-/ sih-LYOOR-ee-ən, sy-) is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at 443.8 million years ago (Mya), to the beginning of the Devonian Period, 419.2 Mya. Silurian Period, in geologic time, the third period of the Paleozoic Era.… 

When Was The Oas Created

The OAS Charter was adopted at the Ninth International Conference of American States in Bogotá, Colombia on April 30, 1948. The OAS Charter reaffirmed the fundamental rights and duties of states, proclaimed the goals of the new organization, and established its organs and agencies. The Organization of American States (Spanish:… 

When Was The Pisa Tower Built

The Leaning Tower of Pisa is one of the most famous monuments in the World. Located in Tuscany, Italy, the Tower was built as a freestanding bell tower for the nearby cathedral. The construction started in 1173 and it took 200 years. The construction of Tower of Pisa began in…