Wikipedia:Main Page history/2016 November 13

From Wikipedia, the free encyclopedia
Welcome to Wikipedia,
5,284,352 articles in English

From today's featured article

Osmium crystals
Osmium crystals

Heavy metals are metals with relatively high densities, atomic weights, or atomic numbers, depending on the context. They are usually the denser metals in metallurgy, or the metals with higher atomic numbers in physics, whereas chemists distinguish heavy metals by their chemical behaviour. Heavy metals tend to be less chemically reactive than light metals such as sodium, magnesium, and aluminium. The earliest known metals are heavy metals, including common metals such as iron, copper, and tin, and precious metals such as silver, gold, and platinum. Less familiar metals such as gallium, hafnium, and thallium are also heavy metals, as are the essential nutrients iron, cobalt, and zinc. Some are toxic in larger amounts or certain forms (silver and indium, for example); others, like cadmium, mercury, and lead, are highly poisonous. Sources of heavy metal poisoning may include mining and industrial waste, agricultural runoff, occupational exposure, paints and treated timber. Heavy metals are relatively scarce in the Earth's crust, but are present in many manufactured products. (Full article...)

Did you know...

Todd McKenney and Nancye Hayes, dancing the waltz
Todd McKenney and Nancye Hayes

In the news

Leonard Cohen in 2008
Leonard Cohen

On this day...

November 13: Feast day of Saint John Chrysostom (Christianity)

Æthelred II of England
Æthelred II of England
More anniversaries:

Today's featured picture

Aiding a Comrade by Frederic Remington

Aiding a Comrade, an oil painting on canvas completed by Frederic Remington (1861–1909) in 1890, the year of his first solo exhibition. Born in Canton, New York, Remington took up drawing soldiers and cowboys at a young age. After making his first journey west, to Montana and Kansas, Remington used his experiences to publish his first work. Over the years Remington was a painter, illustrator, sculptor, and writer, specializing in depictions of the Old American West, specifically images of cowboys, American Indians, and the U.S. Cavalry.

Painting: Frederic Remington

Other areas of Wikipedia

  • Community portal – Bulletin board, projects, resources and activities covering a wide range of Wikipedia areas.
  • Help desk – Ask questions about using Wikipedia.
  • Local embassy – For Wikipedia-related communication in languages other than English.
  • Reference desk – Serving as virtual librarians, Wikipedia volunteers tackle your questions on a wide range of subjects.
  • Site news – Announcements, updates, articles and press releases on Wikipedia and the Wikimedia Foundation.
  • Village pump – For discussions about Wikipedia itself, including areas for technical issues and policies.

Wikipedia's sister projects

Wikipedia is hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other projects: