User:Rfl

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Penrose Tribar

Rafał Pocztarski

Administrator of the English Wikipedia since 2004 (original nomination)

My Contributions: All · Articles · Talk · User talk · Wiki · Wiki talk · Page Deletions · Current rights

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Rules

Simplified ruleset: WP:SIMPLE · Policies and guidelines: WP:PG WP:POLICY WP:GUIDELINE · Five pillars: WP:FIVE WP:5P WP:FIVEPILLARS

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Primary, secondary and tertiary sources: WP:PSTS WP:PRIMARY WP:SECONDARY Third-party sources: WP:THIRDPARTY WP:3PARTY WP:INDEPENDENT

Identifying reliable sources: WP:IRS WP:RS WP:RELY WP:RELIABLE WP:RELIABLESOURCES · Wikipedia:Notability: WP:N WP:NN WP:NOTE

Abuse

Vandalism: WP:VAN WP:VAND WP:VNDL WP:VANDAL · Warning templates · Administrator intervention against vandalism: WP:AIV WP:AIAV WP:RVAN

Abuse response: WP:ABUSE WP:AbRep · Cleaning up vandalism: WP:CUV · WikiProject Vandalism studies: WP:WPVS

Requests for page protection: WP:RFPP WP:RFP WP:RPP WP:PADLOCK · Protection policy: WP:PP WP:PROTECT

Misc

Special:WhatLinksHere

Picture of the day

Featured pictures · visible · candidates

Picture of the day

X-rays are a form of high-energy electromagnetic radiation, with wavelengths shorter than those of ultraviolet rays and longer than those of gamma rays – roughly in the range of 0.01 to 10 nanometres. X-rays were discovered by German scientist Wilhelm Röntgen in 1895, who named them X-radiation to signify an unknown type of radiation. X-rays can penetrate many solid substances such as construction materials and living tissue, and X-ray radiography is widely used in medical diagnostics. This medical significance was noticed by Röntgen shortly after he discovered X-rays; this print, titled Hand mit Ringen (Hand with Rings), is a print of his first medical X-ray, taken of his wife Anna Bertha Ludwig's hand in December 1895.Print credit: Wilhelm Röntgen; restored by Yann Forget

Selected anniversaries

October 21

Aftermath of the Seongsu Bridge disaster

• 1096 – First Crusade: At the Battle of Civetot, the Seljuk forces of Kilij Arslan destroyed the army of the People's Crusade as it marched toward Nicaea.
• 1867 – The first and second of three treaties were signed near Medicine Lodge, Kansas, between the United States federal government and several Native American tribes in the Great Plains, requiring them to relocate to areas in present-day western Oklahoma.
• 1941 – World War II: German soldiers massacred nearly 2,800 Serbs in Kragujevac in reprisal for insurgent attacks in the district of Gornji Milanovac.
• 1968 – At the height of the Japanese university protests, protesters occupied Shinjuku Station in Tokyo and clashed violently with police.
• 1994 – In Seoul, South Korea, 32 people were killed and 17 others injured when a span of the Seongsu Bridge collapsed (pictured).

• Birger Jarl (d. 1266)
• Will Carleton (b. 1845)
• Steph Davies (b. 1987)
• May'n (b. 1989)

More anniversaries:

• October 20
• October 21
• October 22

In the news

Current events:

Yahya Sinwar

• Yahya Sinwar (pictured), the leader of Hamas, is killed in a firefight with Israeli forces in Gaza.
• The Nobel Memorial Prize in Economic Sciences is awarded to Daron Acemoglu, Simon Johnson, and James A. Robinson for their comparative studies of prosperity between nations.
• The Europa Clipper spacecraft is launched to investigate Europa, an icy moon of Jupiter.
• Kenyan Ruth Chepng'etich breaks the women's marathon world record at the Chicago Marathon.

Ongoing:

• Israel–Hamas war
• Israel–Hezbollah conflict
• Russian invasion of Ukraine
  • timeline
• Sudanese civil war
  • timeline

Recent deaths:

• Rick Nolan
• Matia Chowdhury
• Ginés González García
• Garbis Aprikian
• Sukh Dev
• Robert Fulford

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