The News 21/04/2026
Thorium-229 (Th-229) Crystal in a CaF₂ Matrix – The Foundation of Internal Navigation and a Revolution in Modern Tunnel Construction
Throughout human history, the ability to navigate has been one of the decisive factors in expanding our living space—from ocean-crossing voyages to underground megastructures. The advent of the Global Positioning System (GPS) has long been regarded as the “eyes” of modern civilization. However, as humanity ventures into environments where satellite signals cannot reach—deep underground, beneath the ocean, or in outer space—the limitations of GPS become increasingly apparent. It is within this context that a new technology has emerged, carrying the potential to fundamentally transform how we navigate: the Thorium-229 (Th-229) crystal embedded in a Calcium Fluoride (CaF₂) matrix.