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Space is the boundless three-dimensional extent in which objects and events have relative position and direction. Physical space is often conceived in three linear dimensions, although modern physicists usually consider it, with time, to be part of a boundless four-dimensional continuum known as spacetime. In mathematics, "spaces" are examined with different numbers of dimensions and with different underlying structures. The concept of space is considered to be of fundamental importance to an understanding of the physical universe. However, disagreement continues between philosophers over whether it is itself an entity, a relationship between entities, or part of a conceptual framework.
Debates concerning the nature, essence and the mode of existence of space date back to antiquity; namely, to treatises like the Timaeus of Plato, or Socrates in his reflections on what the Greeks called khora (i.e. "space"), or in the Physics of Aristotle (Book IV, Delta) in the definition of topos (i.e. place), or even in the later "geometrical conception of place" as "space qua extension" in the Discourse on Place (Qawl fi al-Makan) of the 11th-century Arab polymath Alhazen. Many of these classical philosophical questions were discussed in the Renaissance and then reformulated in the 17th century, particularly during the early development of classical mechanics. In Isaac Newton's view, space was absolute—in the sense that it existed permanently and independently of whether there were any matter in the space. Other natural philosophers, notably Gottfried Leibniz, thought instead that space was in fact a collection of relations between objects, given by their distance and direction from one another. In the 18th century, the philosopher and theologian George Berkeley attempted to refute the "visibility of spatial depth" in his Essay Towards a New Theory of Vision. Later, the metaphysician Immanuel Kant said neither space nor time can be empirically perceived, they are elements of a systematic framework that humans use to structure all experiences. Kant referred to "space" in his Critique of Pure Reason as being: a subjective "pure a priori form of intuition", hence it is an unavoidable contribution of our human faculties.o
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A Tale of Two Cities (1859) is a novel by Charles Dickens, set in London and Paris before and during the French Revolution. With well over 200 million copies sold, it ranks among the most famous works in the history of fictional literature.
The novel depicts the plight of the French peasantry demoralised by the French aristocracy in the years leading up to the revolution, the corresponding brutality demonstrated by the revolutionaries toward the former aristocrats in the early years of the revolution, and many unflattering social parallels with life in London during the same time period. It follows the lives of several protagonists through these events. The most notable are Charles Darnay and Sydney Carton. Darnay is a former French aristocrat who falls victim to the indiscriminate wrath of the revolution despite his virtuous nature, and Carton is a dissipated English barrister who endeavours to redeem his ill-spent life out of his unrequited love for Darnay's wife. The 45-chapter novel was published in 31 weekly instalments in Dickens's new literary periodical titled All the Year Round. From April 1859 to November 1859, Dickens also republished the chapters as eight monthly sections in green covers. All but three of Dickens's previous novels had appeared only as monthly instalments. The first weekly instalment of A Tale of Two Cities ran in the first issue of All the Year Round on 30 April 1859. The last ran thirty weeks later, on 26 November.