Search results
Results from the WOW.Com Content Network
4th century BC: Thaetetus enumerates the Platonic solids, an early work in graph theory. 4th century BC: Menaechmus discovers conic sections. [37] 4th century BC: Menaechmus develops co-ordinate geometry. [38] 4th century BC: Mozi in China gives a description of the camera obscura phenomenon.
1864 – James Clerk Maxwell: A Dynamical Theory of the Electromagnetic Field (electromagnetic radiation) 1867 – James Clerk Maxwell: On the Dynamical Theory of Gases (kinetic theory of gases) 1871–89 – Ludwig Boltzmann & Josiah Willard Gibbs: Statistical mechanics (Boltzmann equation, 1872) 1873 – Maxwell: A Treatise on Electricity and ...
The Lower Paleolithic period lasted over 3 million years, during which there many human-like species evolved including toward the end of this period, Homo sapiens.The original divergence between humans and chimpanzees occurred 13 (), however interbreeding continued until as recently as 4 Ma, with the first species clearly belonging to the human (and not chimpanzee) lineage being ...
However, when 2,000 years ago, during the Three Kingdoms period, the Chinese inventor Ma Jun created a chariot with a built-in compass for Emperor Ming-di, it was a real wonder.
The following articles cover the timeline of United States inventions: Timeline of United States inventions (before 1890), before the turn of the century; Timeline of United States inventions (1890–1945), before World War II; Timeline of United States inventions (1946–1991), during the Cold War
The 24-year-old from Brooklyn was the first to use a new technology called digitalization to capture images. Four decades later, we carry his invention in our pockets on our phones. Courtesy of ...
In graph theory, two of Petersen's most famous contributions are: the Petersen graph, exhibited in 1898, served as a counterexample to Tait's ‘theorem’ on the 4-colour problem: a bridgeless 3-regular graph is factorable into three 1-factors and the theorem: ‘a connected 3-regular graph with at most two leaves contains a 1-factor’.
A year later, this method is introduced in the United States. The car radio top model "Mexico" from Becker for the first time to an FM area (in mono) and an automatic tuning. 1954 RCA developed for the first apparatus for recording video signals on magnetic tapes. 22 km magnetic tape are needed per hour.