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A graphical view of the Cosmic Calendar, featuring the months of the year, days of December, and the final minute. The Cosmic Calendar is a method to visualize the chronology of the universe, scaling its current age of 13.8 billion years to a single year in order to help intuit it for pedagogical purposes in science education or popular science.
The first known mass extinction was the Great Oxidation Event 2.4 billion years ago, which killed most of the planet's obligate anaerobes. Researchers have identified five other major extinction events in Earth's history, with estimated losses below: [11] End Ordovician: 440 million years ago, 86% of all species lost, including graptolites
July 13: Alfred Dreyfus is exonerated and reinstated as a major in the French Army; the Dreyfus affair ends. August 16: An earthquake in Valparaíso, Chile, magnitude 8.2, kills 20,000. September 28: The US begins the Second Occupation of Cuba. October 23: Brazilian inventor Alberto Santos-Dumont takes off and flies his 14-bis to a crowd in Paris.
These timelines of world history detail recorded events since the creation of writing roughly 5000 years ago to the present day. For events from c. 3200 BC – c. 500 see: Timeline of ancient history. For events from c. 500 – c. 1499, see: Timeline of post-classical history. For events from c. 1500, see: Timelines of modern history.
A timeline is a list of events displayed in chronological order. [1] It is typically a graphic design showing a long bar labelled with dates paralleling it, and usually contemporaneous events. Timelines can use any suitable scale representing time, suiting the subject and data; many use a linear scale, in which a unit of distance is equal to a ...
The geological history of the Earth follows the major geological events in Earth's past based on the geological time scale, a system of chronological measurement based on the study of the planet's rock layers (stratigraphy). Earth formed about 4.54 billion years ago by accretion from the solar nebula, a disk-shaped mass of dust and gas left ...
Wushe incident, a rebellion on Taiwan, which was the last major uprising against colonial Japanese forces in Taiwan. 1931: 18 September: Japan invaded Manchuria in the aftermath of Mukden incident in Northeastern China. 1932: 1 March: Manchukuo, a puppet state of Japan, is established. 28 January to 3 March: Shanghai incident begin for only two ...
Geologic time is the timescale used to calculate dates in the planet's geologic history from its origin (currently estimated to have been some 4,600 million years ago) to the present day. Radiometric dating measures the steady decay of radioactive elements in an object to determine its age. It is used to calculate dates for the older part of ...