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Walter Tschinkel at Florida State University has been making plaster casts of harvester ant nests to study ant architecture and behavior.

Velčovský produced the Snow Vases by moulding snow into vase forms and then casting them in plaster - a technique he describes as "lost-snow...

Jean Arp From Heard and Seen (Forme entendue et vue)

the "Mosaic Court" at the sacred Eanna precinct dedicated to the goddess Inanna from Uruk, southern Mesopotamia, Sumerian civilization (modern Warka, southern Iraq) Uruk IV period, ca 3000 - 3100 BC This building and its columns were made of small mud bricks, which were then faced with a layer of mud plaster. Red, white, or black baked clay cones were then pushed into the mud plaster walls, creating colorful geometric patterns along the pillars and walls. by kairoinfo4u, via Flickr

Ants eating using food coloring

Antique cast iron stove grates - anything can become pretty with distance

Antique cast iron shooting gallery targets. Always looking to acquire this caliber of antique targets.

Cast iron dental articulator skull, 19th century (1800s). These were used as medical training tools for dentists.

These images are part of a series of remarkable patterns that bacteria form when grown in a petri dish. The colors and shading are artistic additions, but the image templates are actual colonies of tens of billions of individual microorganisms. The colony structures form as adaptive responses to laboratory-imposed stresses that mimic hostile environments faced in nature. Eshel Ben-Jacob.

Accidental Art by Lights and Lines, via Flickr

Laocoon, detail. - Vatican museums - by Athenodoros of Rhodes, Polydorus of Rhodes, Agesandro