Ancient metamaterials: The Colosseum in Rome could be protected from earthquake damage by a seismic invisibility cloak. (Courtesy: Bengt Nyman/CC BY 2.0)
Best known for their use as invisibility cloaks, metamaterials are made from large arrays of tiny resonators that manipulate light and other electromagnetic waves in ways that are not typical of other more naturally occurring materials. The ability to manipulate waves in anomalous ways is not just restricted to those of electromagnetism, but to acoustic waves as well.
Previously Resonance Science has reported on the development of novel acoustic metamaterials that can bend, shape, and focus sound waves, some advancements of which can do so with almost perfect efficiency of the metamaterial to redirect sound, and even devices such as SoundBender that allows a sonic tractor beam to grab objects from behind obstacles.
The technological applications for this breakthrough in...
There has been a number of recent scientific discoveries about the Great Pyramids of Giza using technologically advanced methods. For instance, a methodology that utilizes measurements in the variation of flux from cosmic muons (heavy cousins of the electron)—called archaeological muography—detected evidence for a possible second entrance and hidden corridor in the Great Pyramid of Giza (the largest of the Pyramids of Giza). As well, thermal imaging have revealed perplexing thermal anomalies in the Great Pyramid. Several explanations were put forward to explain the cause of the anomalies, but one particularly suggestive explanation was that it is due to increased air circulation caused by a hidden corridor or chamber -- corroborating similar findings using muonic radiographic analysis.