User:Consci

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On this beautiful day of

Tuesday
21
May
02:31 UTC
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Five views of a Viviparus georgianus shell
Viviparus georgianus, commonly known as the banded mystery snail, is a species of large freshwater snail in the family Viviparidae, the river snails. It is native to North America, generally found from the northeastern United States to Florida and the Gulf of Mexico, and thrives in eutrophic lentic environments such as lakes, ponds and some low-flow streams. The snail has has two distinct sexes and reproduces more than once in a lifetime, with females laying eggs singly in albumen-filled capsules. It feeds on diatom clusters found on silt and mud substrates, but it may also require the ingestion of some grit to be able to break down algae. This image shows five views of a 2.1 cm high (0.83 in) V. georgianus shell, originally collected in the U.S. state of Georgia and now in the collection of the State Museum of Natural History Karlsruhe in Germany.Photograph credit: H. Zell

Today's and yesterday's featured pictures


Lucia Chamberlain

Lucia Chamberlain (1882–1978) was an American novelist. Her 1909 book was the basis of the 1916 film The Other Side of the Door, and her 1917 short story "The Underside" formed the basis of the 1920 film Blackmail. The 1916 film The Wedding Guest is also based on her writing. This photograph of Chamberlain was taken around 1908 by the American portrait photographer Zaida Ben-Yusuf, and is now in the collection of the National Portrait Gallery in Washington, D.C.

Photograph credit: Zaida Ben-Yusuf; restored by Adam Cuerden

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Acorn

The acorn is the nut of the oak tree and its close relatives, in the family Fagaceae. Acorns usually contain a seedling surrounded by two cotyledons (seedling leaves), enclosed in a tough shell known as the pericarp, and borne in a cup-shaped cupule. This acorn of the species Quercus robur (the pedunculate oak), with a length of 25 millimetres (1 inch), was photographed in Keila, Estonia.

Photograph credit: Ivar Leidus