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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.
Late modern period. For a timeline of events from 1801 to 1900, see Timeline of the 19th century. For a timeline of events from 1901 to 1945, see Timeline of the 20th century. For 1914–1918, see Timeline of World War I. For 1939–1945 see Timeline of World War II.
Key events of the 20th century. The 20th century changed the world in unprecedented ways. The World Wars sparked tension between countries and led to the creation of atomic bombs, the Cold War led to the Space Race and the creation of space-based rockets, and the World Wide Web was created. These advancements have played a significant role in ...
Juneteenth marks one of the most important moments in American history: the end of slavery in the United States.. On June 19, 1865, federal troops arrived in Galveston, Texas and informed 250,000 ...
February 15: A Day for Wartime Rallying. On February 15, 1898, the USS Maine sank in Havana Harbor, and "Remember the Maine!" became a rallying cry as the U.S. entered the Spanish-American War ...
1610 – Galileo Galilei: discovered the Galilean moons of Jupiter. 1613 – Galileo Galilei: Inertia. 1621 – Willebrord Snellius: Snell's law. 1632 – Galileo Galilei: The Galilean principle (the laws of motion are the same in all inertial frames) 1660 – Blaise Pascal: Pascal's law. 1660 – Robert Hooke: Hooke's law.
1971: Place cells in the brain are discovered by John O'Keefe. 1974: Russell Alan Hulse and Joseph Hooton Taylor, Jr. discover indirect evidence for gravitational wave radiation in the Hulse–Taylor binary. 1977: Frederick Sanger sequences the first DNA genome of an organism using Sanger sequencing.
1952: The first thermonuclear weapon is developed. 1953: The first video tape recorder, a helical scan recorder, is invented by Norikazu Sawazaki. 1954: Invention of the solar battery by Bell Telephone scientists, Calvin Souther Fuller, Daryl Chapin and Gerald Pearson capturing the Sun's power.