Update

history.md

@@ -42,7 +42,7 @@ By 1800 Alessandro Volta invented an **electric battery**. 1816 is known as **Th
 
 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 proceeded to designing 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.
+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. In 1856 Jean Le Bris performed the **first powered flight** in a glider towed by horses, covering a distance of 200 meters.
 
 **Sound recording** with phonatograph was invented in 1857 in Paris, however it could not be played back at the time -- the first record of human voice made with this technology can nowadays be reconstructed and played back. It wouldn't be until 1878 when people could both record and play back sounds with  [Edison](edison.md)'s improvement of phonatograph. A year later, in 1879, Edison also patented the **light bulb**, even though he didn't invent it -- there were at least 20 people who created a light bulb before him. [Pi](pi.md) at this time is evaluated to roughly 500 digit accuracy (using Machin's formula).