How Cats Always Land on their Feet

To be serious, I’m really just posting this to thank Wikimedia. Between Wikipedia, Wikimedia Commons, and Wiktionary (and more), Wikimedia has all the information/images/gifs anyone could ask for…including this gif! And it’s free! Thank you, Wikimedia! My blog would be nothing without you lol

Lagarto Ocelado - Svitlana
External image
NAME: Svitlana
TITLE: Lagarto Ocelado
TECHNIQUE: Acuarela, acrílico, tintas, boli
YEAR: 2015
DESCRIPTION: Se trata de una especie propia de la Europa suroccidental y noroeste de Africa. Sus hábitat son muy variados, secos y muy soleados. Es una pieza clave del ecosistema y es importante conservar la buena salud de sus poblaciones así como la de su hábitat.
Ha sido escogido por mí por las grandes posibilidades que presenta su textura y sus colores , verde negro y azulado en la mayoría de los casos. La ilustración está realizada en papel, con acuarela, algunas zonas con acrílico, tintas y bolígrafo negro
CATEGORY: Profesional
WIKIMEDIA COMMONS: Si. Como autor de la ilustración he dado permiso para que sea cargada en Wikimedia Commons con licencia Creative Commons Reconocimiento Compartir Igual 3.0

via Blogger

Black Hours of Galeazzo Maria Sforza (Sforza Black Hours), attributed to Master of Anthony of Burgundy, Belgium ca. 1466-1476 via Österreichische Nationalbibliothek (Austrian National Library) on Wikimedia Commons. Image I: Public Domain (United States), Image II: Creative Commons Attribution-Share Alike 3.0 Unported.

“The Black Hours of Galeazzo Maria Sforza is an illuminated book of hours which used to be the property of Galeazzo Maria Sforza. Its name derives from its unusual black borders, also found in the New York Black Hours. It follows the Roman liturgy and was produced in Bruges around 1466–76. It measures 25 by 18 centimetres (9.8 by 7.1 in), has 154 folios and includes 14 main miniatures as well as figurative and ornamental initials and borders with medallions. The illuminations of the book are entirely attributed to the anonymous Master of Anthony of Burgundy.” - Black Hours of Galeazzo Maria Sforza, Wikipedia

ok so I want to point out a neat geometrical fact and I don’t feel like drawing these things so I’ll just use some Wikimedia images

  • now we can replace the hexagons with pentagons (leaving the squares and triangles alone), but obviously there’s too much room in the Euclidean plane for that pattern to work, so we go to a place where there’s less room for stuff: spherical 2-space (aka the sphere), which we can see is completely tiled by this pattern, like this:

  • we can also try to replace the hexagons with heptagons, and clearly the Euclidean plane doesn’t have enough room for that, so it turns out that this variant tiles hyperbolic 2-space (where there’s more room), here presented in the form of the Poincaré disk, like this:


Codex Borbonicus, Aztec, Mexico ca. 16th century via National Assembly of France on Wikimedia Commons, Public Domain

Background via Wikipedia, Codex Borbonicus:

The Codex Borbonicus is an Aztec codex written by Aztec priests shortly before or after the Spanish conquest of Mexico. The codex is named after the Palais Bourbon in France. It is held at the Bibliothèque de l'Assemblée Nationale in Paris. In 2004 Maarten Jansen and Gabina Aurora Pérez Jiménez proposed that it be given the indigenous name Codex Cihuacoatl, after the goddess Cihuacoatl.[1]

The Codex Borbonicus is a single 46.5-foot (14.2 m) long sheet of amatl "paper”. Although there were originally 40 accordion-folded pages, the first two and the last two pages are missing. Like all pre-Columbian codices, it was originally entirely pictorial in nature, although some Spanish descriptions were later added. There is dispute as to whether the Codex Borbonicus is pre-Columbian, as the calendar pictures all contain room above them for Spanish descriptions.

Codex Borbonicus can be divided into three sections:

The first section is one of the most intricate surviving divinatory calendars (or tonalamatl). Each page represents one of the 20 trecena (or 13-day periods), in the tonalpohualli (or 260-day year). Most of the page is taken up with a painting of the ruling deity or deities, with the remainder taken up with the 13 day-signs of the trecena and 13 other glyphs and deities.

With these 26 symbols, the priests were able to create horoscopes and divine the future. The first 18 pages of the codex (all that remain of the original 20) show considerably more wear than the last sections, very likely indicating that these pages were consulted more often.

The second section of the codex documents the Mesoamerican 52 year cycle, showing in order the dates of the first days of each of these 52 solar years. These days are correlated with the nine Lords of the Night.

The third section is focused on rituals and ceremonies, particularly those that end the 52-year cycle, when the “new fire” must be lit. This section is unfinished.

Casuarius casuarius
©Paul IJsendoorn

The Southern Cassowary, also known as Double-wattled Cassowary, Australian Cassowary or Two-wattled Cassowary, is a large flightless black bird. It is a ratite and therefore related to the Emu, Ostrich, and the genus Rhea. Cassowaries are closely related to the kiwis — these two bird families diverging from a common ancestor 40 million years ago.

It has hard and stiff plumage, a brown casque atop its head, blue face and neck, red nape and two red wattles hanging down its throat. The plumage is sexually monomorphic, but the female is dominant and larger with a longer casque and brighter-colored bare parts.

The three-toed feet are thick and powerful, equipped with a lethal dagger-like claw up to 12 cm (4.7 in) on the inner toe. The blade-like claws are capable of killing humans and dogs if the bird is provoked.


Other posts:

Southern Cassowary

Northern Cassowary

East African Crested Guineafowl

Oscellated Turkey