The Icelandic sagas of the 10th century record the details of Viking voyages. They describe a mysterious "sunstone", which Scandinavian seafarers used to loe the Sun in the sky and navigate on cloudy days. Iceland spar, formerly known as Iceland crystal is a transparent variety of calcite, or crystallized calcium carbonate, originally brought from Iceland, and used in demonstrating the
Nitrogen - Element information, properties and uses | …
It''s by far the most abundant element in its group in the periodic table and yet it is the last meer of its family to be discovered. The other elements in its group, phosphorus, arsenic, antimony and bismuth, had all been discovered, used and abused at least 100 years before nitrogen was known about.
2. ORIGIN, CLASSIFIION AND DISTRIBUTION OF SALT …
Nature of water Total salt concentration, g/I Siliceous waters - completely fresh waters containing silica and organic substances 0.01 to 0.1 Fresh calcium-bicarbonate waters 0.2 to 0.3 Sodium bicarbonate waters 0.5 to 0.7 Sodium-bicarbonate and carbonate waters
CaCO3 in our life field｜Calcium carbonate …
In 1993 Martian meteorite（ALH84001） was discovered in South Pole. NASA discovered the material which had shown a sign of existence of lives. That is calcium carbonate which involve magnetite that bacteria create in Earth. The Martian meteorite picture
Sannur Cave, Beni Suef, Egypt | Geology Page
Sannur Cave Protectorate is loed in the Beni-Suef governorate of Egypt and lies at 70 km southeast of the city of Beni Suef and 200 km from Cairo. The pl The Sannur Caves were discovered in the 1989s after a blasting in the quarry led to opening of an entrance
Step inside Egypt’s strangest caves - Egypt Today
Egypt shelters a lot of marvelous caves dating back more than 7,000 years and distributed throughout Egypt’s deserts and archeological sites. There are examples of rocky formations and prehistoric cave paintings. These sites are the following: 1- Djara Cave:
4,600-year-old step pyramid uncovered in Egypt and its …
In an incredible new discovery in Edfu, southern Egypt, archaeologists have uncovered a step pyramid that they believe dates back 4,600 years. The pyramid has no internal chaers and was not intended for burial so the purpose of the pyramid remains a mystery.
New dinosaur fossils may be found soon in Red Sea city - …
During the cretaceous era, Egypt’s Western Desert was one of the most fertile areas in the region and attracted many organisms including dinosaurs. After doing extensive studies, the team discovered a link between Mansourasaurus and a European dinosaur, indiing the possibility of the presence of a bridge that linked Africa and Europe millions of years ago.
Eco-Architecture in Egyptian Blue: Scientists Discover …
Egyptian blue was a brilliant blue color first created in ancient Egypt over 4000 years ago. Now, scientists have found it to hold unique qualities that can “reduce building energy consumption and boost solar energy output.” Scientists at the Lawrence Berkeley National Laboratory in California studying the ancient Egyptian shade of blue announced that it might not only boost “building
Chinese jade | Britannica
17/8/2020· Chinese jade, any of the carved-jade objects produced in China from the Neolithic Period (c. 3000–2000 bce) onward. The Chinese have historically regarded carved-jade objects as intrinsically valuable, and they metaphorically equated jade with purity and
Garnet Group: The Colors and Varieties of Garnet
Garnet is not a single mineral, but describes a group of several closely related minerals. Pyrope, Almandine, Spessartite, Uvarovite, Grossular, and Andradite. All species of garnets possess similar physical properties and crystal forms, but differ in chemical
calcium carbonate in ziabwe mining - Cannabis Kweken
Calcium carbonate, as it is used for industrial purposes, is extracted by mining or quarrying. Pure calcium carbonate can be produced from marble, or it can be prepared by passing carbon dioxide into a solution of calcium hydroxide. In the later case calcium
History of Metals Timeline Infographic
There are currently 86 known metals but before the 19th century only 24 had been discovered and, of these 24 metals, 12 were discovered in the 18th century. The Metals of Antiquity, were the metals upon which civilisation was based. (1) Gold (ca) 6000BC
[History of opium poppy and morphine]
Opium has been known for millennia to relieve pain and its use for surgical analgesia has been recorded for several centuries. The Sumerian clay tablet (about 2100 BC) is considered to be the world''s oldest recorded list of medical prescriptions. It is believed by
how was sodium discovered? | Yahoo Answers
23/11/2008· Glass is made by heating sodium carbonate and calcium oxide (lime) together. When the mixture cools, it forms the hard, clear, transparent material called glass. Glass was being manufactured on a large scale in Egypt as early as 1370 B.C.
Why wasn''t aluminium discovered until 1825 - Answers
Calcium All Topics Random Metal and Alloys Why wasn''t aluminium discovered until 1825? Wiki User 2012-11-04 13:17:23 because the in past not worry about
History of bread - Wikipedia
Calcium was added to flour in the UK to prevent rickets which had been detected as common in women who joined the World War 2 effort. Since 1986, domestic breadmakers that automate the process of making bread have become popular in the home.
Ink - Wikipedia
Ink is a liquid or paste that contain pigments or dyes and is used to color a surface to produce an image, text, or design. Ink is used for drawing or writing with a pen, brush, reed pen, or quill. Thicker inks, in paste form, are used extensively in letterpress and lithographic printing. Ink can be a complex medium, composed of solvents
1600–Year-Old Glass Workshop Discovered in Israel | …
In Egypt glass beads have been found that archaeologists believe were made some 4,000 years ago. Yet, evidently glassmaking originated in Mesopotamia, where pieces of well-made glass have been found, believed to date from as early as the third millennium BC.
Ancient game board could be a missing link tied to the …
By the era of the New Kingdom of Egypt, which began in about 1550 B.C., these game boards had acquired a religious syolism, appearing in the Egyptian Book of the Dead. The game seemed to
0 Drugs Used in Ancient Cultures - WondersList
It was actually discovered long before the rest of the world came to know of its existence. It was around the 16th century that the European settlers discovered the drugs in North America. The Indians believed that Tobacco was a holy plant, a gift from god that enabled them to attain heaven for a couple of hours.
Egypt - Wikipedia
Coordinates Egypt (/ ˈ iː dʒ ɪ p t / EE-jipt; Arabic: م صر Miṣr), officially the Arab Republic of Egypt, is a transcontinental country spanning the northeast corner of Africa and southwest corner of Asia by a land bridge formed by the Sinai Peninsula.Egypt is a Mediterranean country bordered by the Gaza Strip and Israel to the northeast, the Gulf of Aqaba and the Red Sea to the east
Benitoite: The Rarest Gemstone Found Only in California
Benitoite is a rare blue barium titanium silie mineral. gemstone quality material has only been found in California. Benitoite can be worth more than Diamonds, Sapphire, Ruby, Emerald or Tanzanite. Benitoite is a rare blue barium titanium silie mineral, found in hydrothermally altered serpentinite.
Development of Baking Powder - National Historic …
In Egypt, around three thousand years ago, someone isolated yeast and discovered how to introduce the culture directly into dough. At the same time, a new strain of wheat was developed which permitted refined white bread.
Group 2 Periodic Table | Elements & General Properties
Beryllium was discovered in 1798 by French chemist Nicolas-Louis Vauquelin. The name was derived from the Greek name beryl Dairy products and grains are the primary sources of dietary calcium. Later the Egypt’s pyramid blocks were built using Uses