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CubeSats: Science, Technology & Risky Business
CubeSats are miniature satellites with cutting edge technology and aerospace innovation. They are small units measuring 10x10x10 cm and...
Sylvia Rose
Feb 285 min read
22 views


Silicon (Si) Metalloid: Prehistory into the Future
Silicon (Si) is the second most abundant element in the Earth's crust, next to oxygen. A ductile metalloid, it's integral to industry and...
Sylvia Rose
Dec 1, 20246 min read
35 views


Heavy Metals Cadmium, Mercury, Lead, Chromium & Arsenic
Toxic heavy metals cadmium, mercury, lead, chromium, and arsenic are elements known for high density and toxicity even in small amounts....
Sylvia Rose
Oct 21, 20246 min read
29 views


Lunar Caustic AgNO3: Lapis Infernalis of Alchemy
Lunar caustic ( lapis infernalis ), Höllenstein (hellstone) or silver nitrate ( argentinium nitrium ) is esteemed by alchemists of the...
Sylvia Rose
Sep 19, 20243 min read
25 views


Poison Pigments of Painters: Renaissance
During the Western Renaissance, new exciting artists' pigments appear in brilliant colors, vibrant scarlet red, deep rich blue,...
Sylvia Rose
Aug 15, 20247 min read
45 views


The Hittites: Dynamic Bronze Age Cultures
The Hittites are first noted in tablets of trade found at the karum of Kanesh ( Kültepe ) in Anatolia, modern day Turkey. The Hittite...
Sylvia Rose
Nov 10, 20235 min read
87 views


Gold - Precious Metal of the Sun
Early prehistoric use of gold is for religious purposes, ornament or decor. In 1500 BCE, Thutmose of Egypt decrees gold to be used for...
Sylvia Rose
Oct 28, 20234 min read
146 views


Silver - Queen of Precious Metals
Silver is a precious and magical metal. In common culture silver appears before 5000 BCE. One of the seven metals of antiquity , silver...
Sylvia Rose
Oct 20, 20234 min read
118 views
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