Tribal communities in southeastern Alaska are partnering with federal and state agencies …
Tribal communities in southeastern Alaska are partnering with federal and state agencies to investigate increasing harmful algal bloomsevents that pose human health risks to subsistence harvesters.
This illustrated guide to Albian (Cretaceous) fossils provides an extensive photo collection …
This illustrated guide to Albian (Cretaceous) fossils provides an extensive photo collection of fossils from the Anglo-Parisian basin. Additional information, high resolution photos and illustrations can be accessed by clicking the fossil icons located on the globe, the time scale or along the top of the page. Although the site is written in French, a non-French-speaking visitor will find this page easy to navigate and the photos well worth the visit. Fauna featured on this site include ammonites, nautiloids, belemnites, gastropods, crusteceans, echinoderms, marine vertebrates and corals.
The albumen silver print, invented in 1850, was the most popular photographic …
The albumen silver print, invented in 1850, was the most popular photographic printing process of the 19th century. To make albumen silver prints, a sheet of paper is coated with albumen (egg white) and salts, then sensitized with a solution of silver nitrate. The paper is exposed in contact with a negative and printed out, which means that the image is created solely by the action of light on the sensitized paper without any chemical development. Because the paper is coated with albumen, the silver image is suspended on the surface of the paper rather than absorbed into the paper fibers. The result is a sharp image with fine detail on a smooth, glossy surface. This project is made possible by a grant from the U.S. Institute of Museum and Library Services, grant number MA-10-13-0194.
Alcatraz is home to one of the world's most infamous prisons. From …
Alcatraz is home to one of the world's most infamous prisons. From the 1930s to 1960s, Alcatraz was the premier maximum security prison, housing inmates such as Al Capone and George Machine Gun Kelly. Before the prison was created, the island was home to American Indians. Today, it is one of San Francisco's most prominent tourist attractions.
Some of the most vivid pigments in medieval manuscripts were manufactured through …
Some of the most vivid pigments in medieval manuscripts were manufactured through alchemy, an experimental practice that predates modern chemistry. Today, chemistry deepens our knowledge about paint colors, their identification, and potential continued transformations.
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