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Evidence of glass during the chalcolithic has been found in Hastinapur, India. [19] The earliest glass item from the Indus Valley civilization is a brown glass bead found at Harappa, dating to 1700 BCE. This makes it the earliest evidence of glass in South Asia. [3] [20] Glass discovered from later sites dating from 600 to 300 BCE displays ...
Earth Day is an annual event on April 22 to demonstrate support for environmental protection.First held on April 22, 1970, it now includes a wide range of events coordinated globally by EARTHDAY.ORG (formerly Earth Day Network) [1] including 1 billion people in more than 193 countries.
Joseph Ritter von Fraunhofer (/ ˈ f r aʊ n ˌ h oʊ f ər /; German: [ˈfraʊnˌhoːfɐ]; 6 March 1787 – 7 June 1826 [1]) was a German physicist and optical lens manufacturer. He made optical glass, an achromatic telescope, and objective lenses.
A glass building facade. Glass is an amorphous (non-crystalline) solid.Because it is often transparent and chemically inert, glass has found widespread practical, technological, and decorative use in window panes, tableware, and optics.
National Bird Day: January 5 International Zebra Day: January 31 World Wetlands Day: February 2 World Ostrich Day [3] [4] February 2 World Marmot Day [5] [6] February 2 World Pangolin Day [7] [8] Third Saturday of February World Whale Day [9] Third Sunday of February World Bonobo Day [10] [11] [12] February 14 World Lizard Day [13] [14] February 8
The 300-plus-year-old glass onion bottles were discovered from ... 2016 documentary following modern-day treasurer ... Working in retirement could slash your Social Security by $239 per month in ...
It has been proposed that glass eye covers in hieroglyphs from the Old Kingdom of Egypt (c. 2686–2181 BCE) were functional simple glass meniscus lenses. [40] The so-called Nimrud lens, a rock crystal artifact dated to the 7th century BCE, might have been used as a magnifying glass, although it could have simply been a decoration. [41] [42 ...
The destruction of Pan Am 103 was an attack on the United States. Of the 270 victims, 190 were American. The rest came from 20 other countries, including 43 people from the UK.