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3 days ago · 1st century AD: The first use of respiratory protective equipment is documented by Pliny the Elder (c. 23 AD –79) using animal bladder skins to protect workers in Roman mines from red lead oxide dust. 1st century AD: Vending machines invented by Hero of Alexandria. By the 1st century AD: The double-entry bookkeeping system in the Roman Empire.
- Fritz Strassmann
Friedrich Wilhelm Strassmann (German: [fʁɪt͡s ˈʃtʁasˌman] ⓘ;...
- Timeline of Electrical and Electronic Engineering
Year Event 600 BC: Ancient Greek philosopher Thales of...
- Timeline of Computing
Timeline of computing presents events in the history of...
- Fritz Strassmann
2 days ago · The Wikimedia Foundation, Inc., abbreviated WMF, is an American 501 (c) (3) nonprofit organization headquartered in San Francisco, California, and registered there as a charitable foundation. [5] It is the host of Wikipedia, the seventh most visited website in the world. In addition, the foundation hosts 14 other related content projects.
1 day ago · The Great Library of Alexandria in Alexandria, Egypt, was one of the largest and most significant libraries of the ancient world. The library was part of a larger research institution called the Mouseion, which was dedicated to the Muses, the nine goddesses of the arts. [10] The idea of a universal library in Alexandria may have been proposed ...
3 days ago · The history of the Internet has its origin in the efforts of scientists and engineers to build and interconnect computer networks.The Internet Protocol Suite, the set of rules used to communicate between networks and devices on the Internet, arose from research and development in the United States and involved international collaboration, particularly with researchers in the United Kingdom and ...
2 days ago · Christianity (from 312) Constantine I [g] (27 February c. 272 – 22 May 337), also known as Constantine the Great, was a Roman emperor from AD 306 to 337 and the first Roman emperor to convert to Christianity. [h] He played a pivotal role in elevating the status of Christianity in Rome, decriminalizing Christian practice and ceasing Christian ...
May 22, 2024 · The discoveries of the 118 chemical elements known to exist as of 2024 are presented here in chronological order. The elements are listed generally in the order in which each was first defined as the pure element, as the exact date of discovery of most elements cannot be accurately determined. There are plans to synthesize more elements, and it ...
May 16, 2024 · Full access to thousands of articles, dictionary terms, illustrations and graphics, bibliographies containing literature citations, and hundreds of Research Updates in all areas of science and technology. Updated daily. Also includes biographies of more than 2,000 well-known scientists from the Hutchinson Dictionary of Scientific Biography.
