Silverpoint is a drawing medium with distinct artistic potential. This delicate and precise medium has a rich history, unique properties,...

Drawing is a creative expression for humans since cave paintings of prehistory. In art, anything making a mark is a drawing tool....

Sanguine is a rich, reddish-brown chalk beloved by Renaissance artists such as Michelangelo. Creating flesh-like tones in the human form...

Mosaic gold is also known to alchemists as aurum musivum or aurum mosaicum due to its mottled formation. Forgotten in the data fields...

Perfumes are prized in ancient civilizations such as Mesopotamia, Egypt, India and China. The word “perfume” comes from Latin per fumum ,...

The Renaissance brings a unique approach to medicine. Based on the Four Humors theory of health the Galenic way, purging the body of...

Antimony oxychloride or Powder of Algaroth is a compound first appearing in 15th century Europe. During the Renaissance Powder of...

Amoebas live in nearly all environments of Earth. Unique adaptations and survival strategies of these canny microorganisms make them...

Microfungi are invisible organisms until they flourish and form colonies. Among these are malevolent microbes dangerous to health, crops,...

The Scientific Revolution, from 1543 to 1687, transforms human understanding of the natural world. This period involves events and...

Jan Baptist van Helmont (1580 - 1644) is a Flemish physician, alchemist / chemist and natural philosopher. A disciple of Paracelsus , he...

A biofilm is a living community of microorganisms including bacteria, fungi and algae. Comprising over 80% of all microbial life on...

The Indus Valley Civilization of the Bronze Age is one of the earliest urban societies, famous for trade, inventiveness and extraordinary...

Catalase is an enzyme found in carbon life forms, including humans. It's known for its exceptional ability to decompose hydrogen peroxide...

Hydrogen peroxide (H2O2) is a basic disinfectant and bleach of many households. If stored too long it will decompose. The decomposition...

Peracetic acid is a remarkable compound with powerful benefits and considerable risks. A colorless liquid with a sharp odor similar to...

Methane microbes are among trillions of microorganisms who call humans home. In digestion these prokaryotes create colorless, odorless...

Arsenic trioxide is a toxic compound with a a long and complex history, known at least by the time of the ancient Romans. Here's a look...

Alchemy uses natural processes, often driven by microbial forces. Unseen biological entities include bacteria, amoeba and flagellates....

Microbes are invisible and exist everywhere, in air, water and soil. Scientists find microbes living in the charred soil wildfires leave...