Search Results: Physical chemistry

This collection on the Vikings, who dominated northern Europe from c. 790 CE to c. 1100 CE, examines not only their fearsome reputation for war and invasion but also their celebrated ships, navigational skills, and runes writing system. In...

A 1645 illustration showing a cardinal checking that Pope Innocent X (in office 1644-55) is indeed a man.

Robert Boyle (1627-1691) was an Anglo-Irish chemist, physicist, and experimental philosopher. Boyle was a prolific author, made significant experiments with air pumps, and presented the first litmus test. A founding member of the Royal Society...

Women scientists during the Scientific Revolution (1500-1700) were few in number because male-dominated educational institutions, as well as scientific societies and academies, barred women entry, meaning that few had the education or opportunity...

Gnosticism is the belief that human beings contain a piece of God (the highest good or a divine spark) within themselves, which has fallen from the immaterial world into the bodies of humans. All physical matter is subject to decay, rotting...

Alchemy is an ancient practice aimed at recreating precious substances using recipes and transformative materials such as the philosopher's stone. Alchemists believed that materials like gold, silver, gems, and purple dye could be recreated...

Unlike the rich corpus of ancient Egyptian funerary texts, no such “guidebooks” from Mesopotamia detail the afterlife and the soul's fate after death. Instead, ancient Mesopotamian views of the afterlife must be pieced together...

The germ theory, which emerged in the late 19th century, demonstrated that microscopic germs caused most human infectious diseases. The germs involved included bacteria, viruses, fungi, protozoa, and prions. Louis Pasteur (1822-1895), a French...

For the Greeks magic (mageia or goeteia) was a wide-ranging topic which involved spells and evil prayers (epoidai), curse tablets (katadesmoi), enhancing drugs and deadly poisons (pharmaka), amulets (periapta) and powerful love potions (philtra...

For the ancient Egyptians life was a celebration, and so, just as one would want to look one's best at any party, personal hygiene was an important cultural value. The Egyptians bathed daily, shaved their heads to prevent lice or other problems...