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Ant colony castings. Molten aluminum is poured into vacant colonies, and the casting is then dug up

Casts of Ant Colonies by Walter Tschinkel

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

P-Wall by Andrew Kudless consists of 150 plaster panels cast in nylon fabric over wooden dowls, Photo from www.matsysdesign.com

Very cool ant hill casting created by pouring molten aluminum into fire ant hill