Search Results: Knot 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...

The 'horse-rider theory' is a controversial proposal that Japan was conquered around the 4th or 5th century CE by a culture from northern Asia to whom the horse was especially important. Although archaeological evidence and genetics point...

A section of the Stora Hammars I stone in Gotland representing a so-called valknut (the three triangles), alongside a figure with a spear, which might be interpreted as Odin, accompanied by what looks like a raven and a hanging man near a...

A quipu (khipu) was a method used by the Incas and other ancient Andean cultures to keep records and communicate information using string and knots. In the absence of an alphabetic writing system, this simple and highly portable device achieved...

On this clay tablet, the author has listed the titles of cuneiform omen collections drawn from celestial and terrestrial phenomena. Rather unusually, he explains that the validity of an individual omen depends on the particular month and...

This clay tablet narrates a geometric-algebraic theory of how to make a solution for a mathematical problem. The conclusion applies a theory very similar to the Pythagorean theorem. From Tell Tell al-Dhabba'i, Iraq. Old-Babylonian period...

This clay tablet narrates a geometric-algebraic theory of angles and triangles, similar to to the theory of Euclid of Alexandria, the father of geometry (lived c. 300 BCE). From Tell Harmal (ancient Shaduppum), Iraq. Old-Babylonian period...

Phrygia was the name of an ancient Anatolian kingdom (12th-7th century BCE) and, following its demise, the term was then applied to the general geographical area it once covered in the western plateau of Asia Minor. With its capital at Gordium...

The Indus Valley Civilization was a cultural and political entity which flourished in the northern region of the Indian subcontinent between c. 7000 - c. 600 BCE. Its modern name derives from its location in the valley of the Indus River...

We all live in states today, and Thomas Hobbes has a good claim to have been the first person to articulate this concept in its modern sense. The intention of Hobbes’s civil science was to lower the temperature of politics, and his concept...