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

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Misc

Special:WhatLinksHere

Picture of the day

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Picture of the day

Trou au Natron is a volcanic caldera in the Tibesti Massif in northern Chad. The volcano is extinct, and it is unknown when it last erupted. Trou au Natron is located just south-east of Toussidé, the westernmost volcano of the Tibesti Mountains. The caldera has an irregular diameter of approximately 6 to 8 kilometres (4 to 5 miles) and is up to 1,000 metres (3,300 ft) deep. Because of its irregular shape, it has been theorized that the caldera was formed as a result of multiple massive explosions, each of which deepened the enormous pit. Its exact period of formation is unconfirmed, although a Pleistocene formation has been suggested. Much of the surface of the caldera is lined with a white crust of carbonate salts such as sodium carbonate and natrolite, known as natron, leading to the caldera's name, literally 'hole of natron' in French. This crust is sometimes known as the Tibesti Soda Lake. Both the slopes and the floor of the caldera contain thick layers of fossilized aquatic gastropods and diatoms, indicating that it was once home to a deep lake. This satellite image of Trou au Natron was taken in 2008 from the International Space Station, at an altitude of around 352 kilometres (219 miles). The white crust can be seen at the bottom of the caldera.Photograph credit: NASA

Selected anniversaries

Vädersolstavlan

April 20: Easter (Christianity, 2025); first day of Ridván (Baháʼí Faith, 2025); 420 (cannabis culture)

• 1535 – Sun dogs were observed over Stockholm, Sweden, inspiring Vädersolstavlan (pictured), the oldest coloured depiction of the city.
• 1657 – Anglo-Spanish War: The English navy sank much of a Spanish treasure fleet at the Battle of Santa Cruz de Tenerife off the Canary Islands, but was unable to capture the treasure.
• 1968 – Pierre Trudeau was sworn in as prime minister of Canada, succeeding Lester B. Pearson.
• 2004 – An incomplete tunnel leading to the Nicoll Highway MRT station in Singapore collapsed, resulting in four deaths and the station's relocation.
• 2010 – An explosion on Deepwater Horizon, an offshore rig in the Gulf of Mexico, resulted in the largest marine oil spill in history.

• William Bedloe (b. 1650)
• David Brainerd (b. 1718)
• Frances Ames (b. 1920)
• Kojo Laing (d. 2017)

More anniversaries:

• April 19
• April 20
• April 21

In the news

Current events:

Daniel Noboa

• Daniel Noboa (pictured) is re-elected president of Ecuador.
• Peruvian writer and Nobel Prize in Literature laureate Mario Vargas Llosa dies at the age of 89.
• A nightclub roof collapse in Santo Domingo, Dominican Republic, kills 231 people.
• In basketball, the UConn Huskies win the NCAA Division I women's championship and the Florida Gators win the men's championship.

Ongoing:

• Gaza war
• M23 campaign
• Russian invasion of Ukraine
  • timeline
• Sudanese civil war
  • timeline

Recent deaths:

• Kyren Lacy
• Aliza Magen-Halevi
• Tommy Helms
• Peter Seiffert
• Abel Rodríguez
• Leo Beenhakker

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