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1640 In Science
The year 1640 in science and technology involved some significant events. Botany * John Parkinson publishes ''Theatrum Botanicum:The Theater of Plants, or, An Herbal of a Large Extent''. Mathematics * The 16-year-old Blaise Pascal demonstrates the properties of the ''hexagrammum mysticum'' in his ''Essai pour les coniques'' which he sends to Mersenne. * October 18 – Fermat states his " little theorem" in a letter to Frénicle de Bessy: if ''p'' is a prime number, then for any integer ''a'', ''a'' ''p'' − ''a'' will be divisible by ''p''. * December 25 – Fermat claims a proof of the theorem on sums of two squares in a letter to Mersenne ("Fermat's Christmas Theorem"): an odd prime ''p'' is expressible as the sum of two squares. Technology * The micrometer is developed. * A form of bayonet is invented; in later years it will gradually replace the pike. * The reticle telescope is developed and initiates the birth of sharpshooting. Births * April 1 †... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pike (weapon)
A pike is a long thrusting spear formerly used in European warfare from the Late Middle Ages and most of the early modern warfare, early modern period, and wielded by infantry, foot soldiers deployed in pike square formation, until it was largely replaced by bayonet-equipped muskets. The pike was particularly well known as the primary weapon of Spanish tercios, Swiss mercenary, German Landsknecht units and French sans-culottes. A similar weapon, the sarissa, had been used in classical antiquity, antiquity by Alexander the Great's Ancient Macedonians, Macedonian phalanx infantry. Design The pike was a long weapon, varying considerably in size, from long. Generally, a spear becomes a pike when it is too long to be wielded with one hand in combat. It was approximately in weight, with the 16th-century military writer John Smith (High Sheriff of Kent), Sir John Smythe recommending lighter rather than heavier pikes. It had a wooden shaft with an iron or steel spearhead affixed. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1696 In Science
The year 1696 in science and technology involved some significant events. History of science * Daniel Le Clerc publishes ''Histoire de la médecine'' in Geneva, the first comprehensive work on the subject. Mathematics * Guillaume de l'Hôpital publishes '' Analyse des Infiniment Petits pour l'Intelligence des Lignes Courbes'', the first textbook on differential calculus, including a statement of his rule for the computation of certain limits. * Jakob Bernoulli and Johann Bernoulli solve the brachistochrone curve problem, the first result in the calculus of variations. Births * ''unknown date'' – Christine Kirch, German astronomer (d. 1782) Deaths * April 30 – Robert Plot, English naturalist and chemist (born 1640) * Jean Richer, French astronomer (born 1630 Events January–March * January 2 – A shoemaker in Turin is found to have the first case of bubonic plague there as the plague of 1630 begins spreading through Italy. * January 5 &ndash ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Though the fossil record is incomplete, numerous studies have demonstrated that there is enough information available to give a good understanding of the pattern of diversification of life on Earth. In addition, the record can predict and fill gaps such as the discovery of '' Tiktaalik'' in the arctic of Canada. Paleontology includes the study of fossils: their age, method of formation, and evolutionary significance. Specimens are sometimes considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years to 4.1 billion years old. Early edition, published online before prin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dinosaur
Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic Geological period, period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the #Evolutionary history, evolution of dinosaurs is a subject of active research. They became the dominant terrestrial vertebrates after the Triassic–Jurassic extinction event 201.3 mya and their dominance continued throughout the Jurassic and Cretaceous periods. The fossil record shows that birds are feathered dinosaurs, Evolution of birds, having evolved from earlier Theropoda, theropods during the Late Jurassic epoch, and are the only dinosaur lineage known to have survived the Cretaceous–Paleogene extinction event approximately 66 mya. Dinosaurs can therefore be divided into avian dinosaurs—birds—and the extinct non-avian dinosaurs, which are all dinosaurs other than birds. Dinosaurs are varied from taxonomy (biology), taxonomic, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chemist
A chemist (from Greek ''chÄ“m(Ãa)'' alchemy; replacing ''chymist'' from Medieval Latin ''alchemist'') is a graduated scientist trained in the study of chemistry, or an officially enrolled student in the field. Chemists study the composition of matter and its properties. Chemists carefully describe the properties they study in terms of quantities, with detail on the level of molecules and their component atoms. Chemists carefully measure substance proportions, chemical reaction rates, and other chemical properties. In Commonwealth English, pharmacists are often called chemists. Chemists use their knowledge to learn the composition and properties of unfamiliar substances, as well as to reproduce and synthesize large quantities of useful naturally occurring substances and create new artificial substances and useful processes. Chemists may specialize in any number of Chemistry#Subdisciplines, subdisciplines of chemistry. Materials science, Materials scientists and metallurgists sha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naturalist
Natural history is a domain of inquiry involving organisms, including animals, fungi, and plants, in their natural environment, leaning more towards observational than experimental methods of study. A person who studies natural history is called a naturalist or natural historian. Natural history encompasses scientific research but is not limited to it. It involves the systematic study of any category of natural objects or organisms, so while it dates from studies in the ancient Greco-Roman world and the mediaeval Arabic world, through to European Renaissance naturalists working in near isolation, today's natural history is a cross-discipline umbrella of many specialty sciences; e.g., geobiology has a strong multidisciplinary nature. Definitions Before 1900 The meaning of the English term "natural history" (a calque of the Latin ''historia naturalis'') has narrowed progressively with time, while, by contrast, the meaning of the related term "nature" has widened (see also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
English People
The English people are an ethnic group and nation native to England, who speak the English language in England, English language, a West Germanic languages, West Germanic language, and share a common ancestry, history, and culture. The English identity began with the History of Anglo-Saxon England, Anglo-Saxons, when they were known as the , meaning "Angle kin" or "English people". Their ethnonym is derived from the Angles (tribe), Angles, one of the Germanic peoples who invaded Great Britain, Britain around the 5th century AD. The English largely descend from two main historical population groups: the West Germanic tribes, including the Angles, Saxons, and Jutes who settled in England and Wales, Southern Britain following the withdrawal of the Ancient Rome, Romans, and the Romano-British culture, partially Romanised Celtic Britons who already lived there.Martiniano, R., Caffell, A., Holst, M. et al. "Genomic signals of migration and continuity in Britain before the Anglo-Sa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Plot
Robert Plot (13 December 1640 – 30 April 1696) was an English naturalist and antiquarian who was the first professor of chemistry at the University of Oxford and the first keeper of the Ashmolean Museum. Early life and education Born in Borden, Kent to parents Robert Plot and Elisabeth Patenden, and baptised on 13 December 1640, Plot was educated at the Wye Free School in Kent. He entered Magdalen Hall, Oxford in 1658 where he graduated with a BA in 1661 and an MA in 1664. Plot subsequently taught and served as dean and vice principal at Magdalen Hall while preparing for his BCL and DCL, which he received in 1671 before moving to University College in 1676.Plot, Robert." Complete Dictionary of Scientific Biography. Vol. 11. Detroit: Charles Scribner's Sons, 2008. 40–41. Gale Virtual Reference Library. Web. 4 June 2013. Natural history and chemistry By this time, Plot had already developed an interest in the systematic study of natural history and antiquities. In June ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1697 In Science
{{Science year nav, 1697 The year 1697 in science and technology involved some significant events. Technology * August – Peter the Great, Tsar of Russia, studies shipbuilding and other technologies in Holland as part of his incognito Grand Embassy to western Europe. Organizations * January – Bernard le Bovier de Fontenelle becomes perpetual secretary of the French Academy of Sciences, in succession to Jean-Baptiste du Hamel. Publications * First known publication of English physician Richard Boulton, ''A Treatise of the Reason of Muscular Motion''. * William Dampier publishes ''A New Voyage Round the World'' in London. Births * February 24 – Bernhard Siegfried Weiss, later known as Albinus, German-born Dutch anatomist (died 1770) * February 5 – William Smellie, Scottish obstetrician (died 1763) * September 23 – Andrew Plummer, Scottish physician and chemist (died 1756) Deaths * January 26 – Georg Mohr, Danish mathematician (born 1640) * March 1 – Francesc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mathematician
A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, mathematical structure, structure, space, Mathematical model, models, and mathematics#Calculus and analysis, change. History One of the earliest known mathematicians was Thales of Miletus (); he has been hailed as the first true mathematician and the first known individual to whom a mathematical discovery has been attributed. He is credited with the first use of deductive reasoning applied to geometry, by deriving four corollaries to Thales's theorem. The number of known mathematicians grew when Pythagoras of Samos () established the Pythagorean school, whose doctrine it was that mathematics ruled the universe and whose motto was "All is number". It was the Pythagoreans who coined the term "mathematics", and with whom the study of mathematics for its own sake begins. The first woman math ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Danish People
Danes (, ), or Danish people, are an ethnic group and nationality native to Denmark and a modern nation identified with the country of Denmark. This connection may be ancestral, legal, historical, or cultural. History Early history Denmark has been inhabited by various Germanic peoples since ancient times, including the Angles (tribe), Angles, Cimbri, Jutes, Herules, Teutones and others. A 2025 study in ''Nature'' found genetic evidence of an influx of central European population after about 500 ce into the region later ruled by the Danes. Viking Age The first mention of Danes within Denmark is on the Jelling stones#Runestone of Harald Bluetooth, Jelling Rune Stone, which mentions the conversion of the Danes to Christianity by Harald Bluetooth in the 10th century. Between and the early 980s, Bluetooth established a kingdom in the lands of the Danes, stretching from Jutland to Scania. Around the same time, he received a visit from a German missionary who, by surviving an t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
