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@ -40,7 +40,7 @@ In 1792 Clause Chappe invented **[optical telegraph](optical_telegraph.md)**, al
By 1800 Alessandro Volta invented an **electric battery**. In 1827 André-Marie Ampère publishes a further work shedding light on [electromagnetism](electromagneticm.md). After this **[electric telegraph](telegraph.md)** would be worked on and improved by several people and eventually made to work in practice. In 1821 Michael Faraday invented the **[electromotor](electromotor.md)**. Georg Ohm and especially [James Maxwell](maxwell.md) would subsequently push the knowledge of electricity even further.
In 1822 [Charles Babbage](charles_babbage.md), a great English mathematician, completed the first version of a manually powered **[digital](digital.md) [mechanical](mechanical.md) [computer](computer.md)** called the Difference Engine to help with the computation of [polynomial](polynomial.md) [derivatives](derivative.md) to create mathematical tables used e.g. in navigation. It was met with success and further development was funded by the government, however difficulties of the construction led to never finishing the whole project. In 1837 Babbage designed a new machine, this time a **[Turing complete](turing_complete.md) general purpose computer**, i.e. allowing for programming with branches and loops, a true marvel of technology. It also ended up not being built completely, but it showed a lot about what computers would be, e.g. it had an [assembly](assembly.md)-like programming language, memory etc. For this computer [Ada Lovelace](ada_lovelace.md) would famously write the Bernoulli number algorithm.
In 1822 [Charles Babbage](charles_babbage.md), a fantastic English mathematician, completed the first version of a manually powered **[digital](digital.md) [mechanical](mechanical.md) [computer](computer.md)** called the Difference Engine whose purpose was to help with the computation of [polynomial](polynomial.md) [derivatives](derivative.md) to subsequently create mathematical tables used e.g. in navigation. It was met with success and further development became funded by the government, however difficulties of the construction led to never finishing the whole project. In 1837 Babbage designed a new machine, this time a **[Turing complete](turing_complete.md) general purpose computer**, i.e. allowing for programming with branches and loops, a true marvel of technology. It also ended up not being built completely, but it showed a lot about what computers would be, e.g. it had an [assembly](assembly.md)-like programming language, memory etc. For this computer [Ada Lovelace](ada_lovelace.md) would famously write the Bernoulli number algorithm.
In 1826 or 1827 French inventor Nicéphore Niépce captured **first [photography](photo.md)** that survived until today -- a view from his estate named Le Gras. About an 8 hour exposure was used (some say it may have taken several days). He used a [camera obscura](camera_obscura.md) and asphalt plate that hardened where the light was shining. Earlier cases of photography existed maybe as early as 1717, but they were only short lived.
@ -62,7 +62,7 @@ Meanwhile (around 1915) [Albert Einstein](einstein.md), a German physicist, comp
7 November 1917 was the date of so called October Revolution ("October" because of different dating back then) that was part of the **Russian Revolution** led by Vladimir Lenin and his [Marxist](marxism.md) Bolshevik party. This got rid of the Russian Empire and would eventually establish the **[Soviet Union](ussr.md)** in 1922.
In 1923 the research of mainly Edwin Hubble leads to concluding there exist other galaxies in the Universe besides our Milky Way, vastly expanding the size of known Universe.
In 1923 the research of mainly Edwin Hubble leads to the conclusion that there exist other galaxies in the [Universe](universe.md) besides our Milky Way, vastly expanding the size of known Universe.
In 1924 about 50% of US households own a car.