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1 day 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
1 day ago · The Sasanian Empire ( / səˈsɑːniən, səˈseɪniən /) or Sassanid Empire, sometimes referred to Second Persian Empire or Neo-Persian Empire [9], officially known as Eranshahr ("Kingdom of the Iranians"), [10] [11] was the last Iranian empire before the early Muslim conquests of the 7th to 8th centuries.
1 day ago · 2001 was a common year starting on Monday of the Gregorian calendar, the 2001st year of the Common Era (CE) and Anno Domini (AD) designations, the 1st year of the 3rd millennium and the 21st century, and the 2nd year of the 2000s decade.
2 days ago · Historical earthquakes is a list of significant earthquakes known to have occurred prior to the early 20th century. As the events listed here occurred before routine instrumental recordings, they rely mainly on the analysis of written sources, observations of shaking objects and/or animal behavior during earthquakes and religious/traditional beliefs about earthquakes such as "God's punishment".
2 days ago · PTV (1994–99) Official website. pbskids.org. PBS Kids, stylized as PBS KIDS, is the brand for most [note 1] of the children's programming aired by PBS in the United States. The target audience is children between the ages of 2 and 8. [2] PBS Kids brand programming is aired daily on most local PBS stations during a daytime block, typically ...
- United States
- July 11, 1994; 29 years ago (PTV), September 6, 1999; 24 years ago (as PBS Kids)
- PTV (1994–99)
- PBS
4 days ago · A celebration of 45 years of 2000 AD. Featuring celebrity fans and legendary creators, The Galaxy’s Greatest will stream online and for free on 26 and 27 March on 2000 AD’s social media channels and YouTube, and Rebellion’s dedicated Twitch stream. Learn More. 2000 AD is the Galaxy's Greatest Comics - the legendary home of Judge Dredd and ...
18 hours ago · 总统奥巴马在2009年承诺公开这28页报告，給予受難者家屬一個交代。2016年7月16日，美国国会公布该28页报告的大部分内容，尽管如此，报告中还有174处文字被保密而涂黑至无法阅读 。根据被公布的部分，儘管其內容僅是調查員懷疑沙國皇室駐美大使的一些可疑電 ...
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