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20th-century percussion instruments (21 P) Pages in category "20th-century inventions" ... Point of sale; Popham panel; Power window; R.
1st century BC: Segmental arch bridge (e.g. Pont-Saint-Martin or Ponte San Lorenzo) in Italy, Roman Republic [271] [272] 1st century BC: News bulletin during the reign of Julius Caesar. [273] A paper form, i.e. the earliest newspaper, later appeared during the late Han dynasty in the form of the Dibao. [274] [275] [276]
From the first Apple computer to the COVID-19 vaccine, here are the most revolutionary inventions that were born in the U.S.A. in the past half-century.
Electrification spread rapidly in the 20th century. At the beginning of the century electric power was for the most part only available to wealthy people in a few major cities. By 2019, an estimated 87 percent of the world's population had access to electricity. [98] Birth control also became widespread during the 20th century.
An AI-powered toilet seat has been named by Time Magazine as one of the top 200 inventions of 2024. It optically scans a user’s stool and urine, to detect any concerning changes that might ...
3rd century BC: Archimedes uses the method of exhaustion to construct a strict inequality bounding the value of π within an interval of 0.002. 3rd century BC: Archimedes develops the field of statics, introducing notions such as the center of gravity, mechanical equilibrium, the study of levers, and hydrostatics.
The increase of 25% CO2 expected by the end of the century therefore corresponds to an increase of 0.6°C in the world temperature – an amount somewhat greater than the climatic variation of recent centuries. – John Sawyer, 1972. The mainstream news media at the time exaggerated the warnings of the minority who expected imminent cooling.
The Information Age [a] is a historical period that began in the mid-20th century. It is characterized by a rapid shift from traditional industries, as established during the Industrial Revolution, to an economy centered on information technology. [2]