Penn students make obsidian tools to learn about the material properties of different types of stone.
PHILADELPHIA – Using innovative technology, the Penn Museum peers inside a fascinating, hidden world with a new 1,100-square-foot special exhibition, “Invisible Beauty: The Art of Archaeological Science,” which will be on view through June 6.
Through more than 25 stunning images, “Invisible Beauty” unlocks the wonder of the human story – exposing objects’ concealed information with the use of high-powered microscopes and multimodal imaging that employs infrared light.
The special exhibition zooms in on the exquisite details that are not visible to the naked eye in a series of microscopic photographs, x-rays and magnetic gradiometry survey results, which allows archaeologists to map what’s underground without digging – alongside some of the artifacts themselves in a thought-provoking display.
Detail of a moccasin made by a Huron-Wendat artist in the Lake Ontario region of North America more than 200 years ago.
By extracting and analyzing information from artifacts, specimens and landscapes – unseen decorations on ancient sculptures, metallurgical textures, colorful crystals and cellular structures – archaeologists and anthropologists are better able to answer questions related to technology, use, trade, diet, health and the environment at the time. For instance, when looking closer at a sample from a corroded bronze needle found on the island of Cyprus, one can see its metal microstructure and a large black swirl of corrosion, illustrating the way the craftsperson was turning the needle as they hammered it. And, using a high level of magnification to view a Seventeenth Century Persian textile reveals how its silk threads were delicately wrapped in silver metal strips.
Highlighting multiple scales, the exhibition invites guests not only to examine a tiny diatom, a single-cell organism at 26,000x magnification, which was found in a clay sample from Ban Chiang, Thailand, but also to immerse themselves in a representation of an ancient city – Zincirli, located in present-day Turkey.
In addition, “Invisible Beauty” spotlights the important role of research in archaeological discovery, including the cutting-edge work inside the Museum’s Center for the Analysis of Archaeological Materials (CAAM), which was created in 2014 in partnership with the School of Arts and Sciences at Penn.
“Many people are familiar with excavations, but they usually aren’t familiar with what happens in the labs, which are not typically accessible to the general public,” says Dr Marie-Claude Boileau, the director of CAAM and co-curator of “Invisible Beauty.” Her work focuses on Near Eastern and Mediterranean archaeology and specializes in ceramic analysis. “This exhibit is like a behind-the-scenes experience for visitors. It shows what we see when we look down the microscope, and with this exhibition we’re sharing it with everyone.”
As seen under a microscope, a basalt inclusion in a ceramic tile from the first half of Sixth Century BCE, from Gordion, in present-day Turkey. Photo: Janelle Sadarananda and Brigitte Keslinke. SAM 1954-1-128.
Simultaneously, the exhibition showcases the invaluable interdisciplinary undergraduate and graduate student research opportunities available at the University of Pennsylvania.
Dr Sarah Linn, research liaison at the Penn Museum and co-curator of Invisible Beauty, is a Mediterranean archaeologist who specializes in Aegean prehistory. Her passion is sharing the museum’s work with the public, including the student research that takes place inside the classroom.
“Some of the microscopic images in the exhibition are the result of an experiment we do as a part of a CAAM course, during which students create and then use obsidian tools,” Linn says. “Invisible Beauty dovetails nicely with the work of CAAM and our Academic Engagement Department, as it provides students with opportunities to present their research to the public.” Linn adds that the exhibition offers a one-of-a-kind sense of discovery for visitors by demonstrating how research is constantly happening in the laboratory.
“It tells a beautiful story about the past, displaying objects and specimens that visitors wouldn’t normally see in an exhibition. Mundane objects and material – when under a microscope – come to life,” Linn says.
The Penn Museum is at 3260 South Street. For more information, www.penn.museum.com or 215-898-4000.
