Portal:History of science
The History of Science Portal
The history of science covers the development of science from ancient times to the present. It encompasses all three major branches of science: natural, social, and formal. Protoscience, early sciences, and natural philosophies such as alchemy and astrology during the Bronze Age, Iron Age, classical antiquity, and the Middle Ages declined during the early modern period after the establishment of formal disciplines of science in the Age of Enlightenment.
Science's earliest roots can be traced to Ancient Egypt and Mesopotamia around 3000 to 1200 BCE. These civilizations' contributions to mathematics, astronomy, and medicine influenced later Greek natural philosophy of classical antiquity, wherein formal attempts were made to provide explanations of events in the physical world based on natural causes. After the fall of the Western Roman Empire, knowledge of Greek conceptions of the world deteriorated in Latin-speaking Western Europe during the early centuries (400 to 1000 CE) of the Middle Ages, but continued to thrive in the Greek-speaking Byzantine Empire. Aided by translations of Greek texts, the Hellenistic worldview was preserved and absorbed into the Arabic-speaking Muslim world during the Islamic Golden Age. The recovery and assimilation of Greek works and Islamic inquiries into Western Europe from the 10th to 13th century revived the learning of natural philosophy in the West. Traditions of early science were also developed in ancient India and separately in ancient China, the Chinese model having influenced Vietnam, Korea and Japan before Western exploration. Among the Pre-Columbian peoples of Mesoamerica, the Zapotec civilization established their first known traditions of astronomy and mathematics for producing calendars, followed by other civilizations such as the Maya.
Natural philosophy was transformed during the Scientific Revolution in 16th- to 17th-century Europe, as new ideas and discoveries departed from previous Greek conceptions and traditions. The New Science that emerged was more mechanistic in its worldview, more integrated with mathematics, and more reliable and open as its knowledge was based on a newly defined scientific method. More "revolutions" in subsequent centuries soon followed. The chemical revolution of the 18th century, for instance, introduced new quantitative methods and measurements for chemistry. In the 19th century, new perspectives regarding the conservation of energy, age of Earth, and evolution came into focus. And in the 20th century, new discoveries in genetics and physics laid the foundations for new sub disciplines such as molecular biology and particle physics. Moreover, industrial and military concerns as well as the increasing complexity of new research endeavors ushered in the era of "big science," particularly after World War II. (Full article...)
Selected article -
![](http://upload.wikimedia.org/wikipedia/commons/thumb/4/47/TobaccoMosaicVirus.jpg/220px-TobaccoMosaicVirus.jpg)
The history of virology – the scientific study of viruses and the infections they cause – began in the closing years of the 19th century. Although Edward Jenner and Louis Pasteur developed the first vaccines to protect against viral infections, they did not know that viruses existed. The first evidence of the existence of viruses came from experiments with filters that had pores small enough to retain bacteria. In 1892, Dmitri Ivanovsky used one of these filters to show that sap from a diseased tobacco plant remained infectious to healthy tobacco plants despite having been filtered. Martinus Beijerinck called the filtered, infectious substance a "virus" and this discovery is considered to be the beginning of virology.
The subsequent discovery and partial characterization of bacteriophages by Frederick Twort and Félix d'Herelle further catalyzed the field, and by the early 20th century many viruses had been discovered. In 1926, Thomas Milton Rivers defined viruses as obligate parasites. Viruses were demonstrated to be particles, rather than a fluid, by Wendell Meredith Stanley, and the invention of the electron microscope in 1931 allowed their complex structures to be visualised. (Full article...)Selected image
![](http://upload.wikimedia.org/wikipedia/commons/thumb/d/d4/Woman_teaching_geometry.jpg/250px-Woman_teaching_geometry.jpg)
In this detail from an early 14th century copy of Euclid's Elements, a woman is shown teaching geometry. It is a detail of a scene in the bowl of the letter 'P'; the woman, with a set-square and dividers, uses a compass to measure distances on a diagram. In her left hand she holds a square, an implement for testing or drawing right angles. She is watched by a group of students. In images from the Middle Ages, it is unusual to see women represented as teachers, in particular when the students appear to be monks. She may be the personification of Geometry.
Did you know
...that Einstein's famous letter to FDR about the possibility of an atomic bomb was actually written by Leó Szilárd?
...that geology was transformed in the latter part of the 20th century after widespread acceptance of plate tectonics?
...that the idea of biological evolution dates to the ancient world?
Selected Biography -
James Bryant Conant (March 26, 1893 – February 11, 1978) was an American chemist, a transformative President of Harvard University, and the first U.S. Ambassador to West Germany. Conant obtained a Ph.D. in chemistry from Harvard in 1916.
During World War I, he served in the U.S. Army, where he worked on the development of poison gases, especially Lewisite. He became an assistant professor of chemistry at Harvard University in 1919 and the Sheldon Emery Professor of Organic Chemistry in 1929. He researched the physical structures of natural products, particularly chlorophyll, and he was one of the first to explore the sometimes complex relationship between chemical equilibrium and the reaction rate of chemical processes. He studied the biochemistry of oxyhemoglobin providing insight into the disease methemoglobinemia, helped to explain the structure of chlorophyll, and contributed important insights that underlie modern theories of acid-base chemistry. (Full article...)Selected anniversaries
- 1649 - Death of Robert Dudley, styled Earl of Warwick, English explorer and geographer (b. 1574)
- 1732 - Birth of Johan Wilcke, Swedish physicist (d. 1796)
- 1766 - Birth of John Dalton, British chemist and physicist (d. 1844)
- 1802 - Birth of Alcide d'Orbigny, French naturalist (d. 1857)
- 1892 - Birth of Sir Edward Appleton, English physicist, Nobel Prize laureate (d. 1965)
- 1902 - Death of Frederick Augustus Abel, English chemist (b. 1827)
- 1906 - Birth of Luis Federico Leloir, French-born chemist, Nobel Prize laureate (d. 1987)
- 1939 - Birth of Susumu Tonegawa, Japanese molecular biologist, recipient of the Nobel Prize in Physiology or Medicine
- 1943 - Birth of Richard J. Roberts, English biochemist and molecular biologist, recipient of the Nobel Prize in Physiology or Medicine
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