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Pyrography or pyrogravure is the free handed art of decorating wood or other materials with burn marks resulting from the controlled application of a heated object such as a poker. It is also known as pokerwork or wood burning. [1] The term means "writing with fire", from the Greek pyr (fire) and graphos (writing). [2]
Rudolph Franz Zallinger (German pronunciation: [ˈru:dɔlf ˈtsa:lɪŋɐ]; [2] November 12, 1919 – August 1, 1995) was an American-based Austrian-Russian artist. His most notable works include his mural The Age of Reptiles (1947) at Yale University's Peabody Museum of Natural History, and the March of Progress (1965) with numerous parodies and versions.
Fractal burning, Lichtenberg burning or wood fracking refers to a technique where a Lichtenberg figure is burnt into wood using high voltage electricity. [1][2][3][4] It has gained notoriety due to numerous incidents of death or severe injuries when people have attempted it at home, with at least 33 people having died between 2017 and 2022. [1][5]
In the United States, feral and free-ranging domestic cats kill an estimated 6.3–22.3 billion mammals annually. [ 141 ] In Australia, one study found feral cats to kill 466 million reptiles per year.
A Wisconsin couple was electrocuted attempting a popular but dangerous wood-burning technique, law enforcement officials said. The "fractal burning" technique creates lightning-like etchings by ...
Keratin. Keratin (/ ˈkɛrətɪn / [1][2]) is one of a family of structural fibrous proteins also known as scleroproteins. Alpha-keratin (α-keratin) is a type of keratin found in vertebrates. It is the key structural material making up scales, hair, nails, feathers, horns, claws, hooves, and the outer layer of skin among vertebrates.
Figure 1:In mammals, the quadrate and articular bones are small and part of the middle ear; the lower jaw consists only of dentary bone.. While living mammal species can be identified by the presence of milk-producing mammary glands in the females, other features are required when classifying fossils, because mammary glands and other soft-tissue features are not visible in fossils.
Echidnas are medium-sized, solitary mammals covered with coarse hair and spines. [6] The spines are modified hairs and are made of keratin, the same fibrous protein that makes up fur, claws, nails, and horn sheaths in animals. [2] Spines of the echidna. Superficially, they resemble the anteaters of South America and other spiny mammals such as ...