Publications
Degradation of ancient Maya carved tuff stone at Copan and its bacterial bioconservation
Researchers have identified a novel bioconservation method that effectively stabilizes ancient Maya tuff stone at Copan, addressing significant degradation issues caused by humidity-induced clay swelling and microbial weathering. Traditional consolidants, such as polymer- and alkoxysilane-based treatments, have proven ineffective in preventing this damage. The study demonstrates that applying a sterile nutritional solution activates indigenous bacteria to produce calcium carbonate biocement, which strengthens the stone matrix while reducing clay swelling due to bacterial exopolymeric substances (EPS). This environmentally friendly approach not only preserves fragile stones but also imparts hydrophobicity, making it a promising solution for tropical conditions. The findings open new avenues for conservation efforts in UNESCO World Heritage Sites like Copan and similar regions.
Bacterial Diversity Evolution in Maya Plaster and Stone Following a Bio-Conservation Treatment
A novel bio-conservation treatment for Maya stone and plaster, leveraging indigenous carbonatogenic bacteria, significantly alters bacterial diversity while promoting beneficial microbial communities. The patented M-3P nutritional solution enhances the growth of genera like Arthrobacter, Micrococcaceae, Nocardioides, Fictibacillus, and Streptomyces in carved stone blocks at Copan (Honduras), along with others such as Bacillus and Agrococcus in lime plaster. These bacteria are known for calcium carbonate biomineralization, suggesting the treatment's effectiveness. Notably, the approach reduces or eliminates harmful acid-producing bacteria like Marmoricola and Acidobacteria. This study demonstrates that the bio-conservation method is a safe and effective solution for preserving Maya archaeological sites in hot, humid tropical conditions, with potential applications worldwide.
Jaguar and puma captivity and trade among the Maya: Stable isotope data from Copan, Honduras
A new analysis of stable isotope data from the Maya site of Copán, Honduras (A.D. 426–822), reveals that jaguars and pumas were systematically managed through captivity and trade for ritual purposes. Two distinct dietary regimes—one enriched with C4 plant inputs indicative of artificial feeding, the other dominated by natural C3 signatures—were identified among felid remains from public and private rituals, including those in Altar Q and Motmot caches. This pattern, combined with species-specific oxygen isotope variations, suggests an extensive faunal trade network operating across the Copán Valley. The findings demonstrate that wild animals were intentionally brought into human settlements to be processed into secondary goods or used ritually, providing direct evidence for the Maya's sophisticated animal management practices during the Classic period.
The MayaArch3D project: A 3D WebGIS for analyzing ancient architecture and landscapes
The MayaArch3D project successfully bridges the gap between 3D modeling and Geographic Information Systems (GIS) to create an innovative analytical tool for studying ancient architecture and landscapes. This 3D WebGIS, named QueryArch3D, enables researchers to interact with high-resolution 3D models of structures like those in the UNESCO World Heritage Site of Copán, Honduras, while also querying spatially referenced data in real time within a virtual reality (VR) environment. Unlike traditional GIS or standalone 3D models, this platform integrates multiple data types—including computer-assisted design and reality-based models—with attribute data stored in spatial databases, offering unprecedented analytical capabilities for humanities research. Beta testing demonstrates its potential to expand research questions and methodologies, marking a significant advancement in digital humanities tools.
Kinect and 3D GIS in archaeology
A low-cost, portable system leveraging Microsoft's Kinect enables virtual navigation and gesture-based interaction with a digitally reconstructed 3D GIS model of the ancient Maya city of Copan. This prototype, part of the MayaArch3D project, demonstrates how integrating databases with 3D digital tools can enhance research and teaching on ancient architectures. The system, built using the Flexible Action and Articulated Skeleton Toolkit (FAAST), allows users to remotely control movements in the virtual environment through touchless gestures, fostering spatial awareness and embodiment while retrieving multimedia information from a spatial database.
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