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Robert Boyle
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...
Definition
Meiji Period
The Meiji period refers to the period in Japanese history from 1868 to 1912 during which the Meiji Emperor reigned. Following the overthrow of the Tokugawa shogunate in the Meiji Restoration of 1868, Japan's new leaders embarked on a program...
Definition
Germ Theory
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...
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Discovery of X-Rays
The discovery of X-rays – a form of invisible radiation that can pass through objects, including human tissue – revolutionised science and medicine in the late 19th century. Wilhelm Conrad Röntgen (1845-1923), a German scientist, discovered...
Definition
Roman Engineering
The Romans are known for their remarkable engineering feats, be they roads, bridges, tunnels, or their impressive aqueducts. Their constructions, many of them still standing, are a testament to their superior engineering skills and ingenuity...
Definition
Alchemy
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...
Definition
Gold in Antiquity
Gold, chemical symbol Au (from the Latin aurum meaning 'shining dawn'), is a precious metal which has been used since antiquity in the production of jewellery, coinage, sculpture, vessels and as a decoration for buildings, monuments and statues...
Definition
Orichalcum
Orichalcum ("mountain copper") or aurichalcum ("gold copper") was a metal used in coins during ancient times. Orichalcum was a golden-yellow coloured mixture consisting of both copper and zinc and referred to as brass. The Romans were the...
Article
Obsidian in Mesoamerica
Obsidian is a dark volcanic glass which provides the sharpest cutting edge available in nature. Ancient Mesoamerican cultures greatly esteemed the properties of obsidian, and it was widely traded across the region. Obsidian was used to create...
Article
The Stonehenge Burials
A great deal has been written about why the prehistoric monument of Stonehenge, in Wiltshire, southern England, was constructed. Perhaps it was designed as a temple to the ancestors, an astronomical calendar, a healing centre or a giant computer...