«We developed a system that takes silicone elastomer and placed hollow cavities in such a way that can equally distribute pressure on the skin of the body,» the study's lead author Robert Katzschmann told TechCrunch. (techcrunch.com)
Paranasal sinuses are essentially hollow cavities in the skull surrounding your nasal cavity. (sciencedaily.com)
These rock formations filled with tiny crystalline surprises take shape once hollow cavities form in the earth, often left over from magma or withering organic matter. (mindbodygreen.com)