D_1_22 — Pacific Island Megalithic: Nan Madol, Lelu Ruins, and Oceanic Stone Architecture

Nan Madol — a ceremonial complex of 92 artificial islets spread across a shallow lagoon off the southeast coast of Pohnpei (Federated States of Micronesia) — is one of the most enigmatic megalithic sites on Earth and has

D_5_10 — Crystal, Stone, and Piezoelectric Technology Claims

Piezoelectricity — the generation of electrical charge from mechanical stress in certain crystals — is well-established physics (discovered by Jacques and Pierre Curie, 1880). Quartz, the most abundant piezoelectric mine

D_5_18 — Mandala Sacred Architecture: Cross-Cultural Cosmic Diagrams in Stone

The mandala (Sanskrit: "circle" or "completion") is a geometric diagram — typically featuring concentric circles and squares, radial symmetry, and a defined center — that functions as a map of the cosmos, a meditation ai

D_3_03 — Moai of Rapa Nui — Transport, Engineering, and Cultural Context

The moai of Rapa Nui (Easter Island) are among the most recognizable monumental sculptures on Earth: 887 statues carved from compressed volcanic tuff at the Rano Raraku quarry, averaging 4m tall and 12.5 tonnes, with the

D_4_10 — Yonaguni Formation: Japan's Submerged Stone Controversy

The Yonaguni Formation (also called the "Yonaguni Monument" or "Yonaguni Submarine Ruins") is a submerged rock structure located off the southern coast of Yonaguni Island, the westernmost of Japan's Ryukyu Islands (24°26

F_2_17 — Trans-Saharan Rock Art Corridors: Mobility Evidence in Stone

The Sahara Desert — today the world's largest hot desert (~9.2 million km²) and one of Earth's most formidable barriers to human movement — was, during recurring humid periods (the "Green Sahara" or "African Humid Period

ZA_5_21 — Quantum Computing: Architectures and Milestones

Quantum computing exploits the quantum mechanical phenomena of superposition, entanglement, and interference to perform calculations that are intractable for classical computers. The concept was proposed by Richard Feynm

D_1_25 — Ollantaytambo: Megalithic Engineering in the Sacred Valley

Ollantaytambo (Quechua: Ullantaytampu) is a monumental Inca archaeological site at 2,792 m elevation in the Sacred Valley (Urubamba Valley) of Peru, approximately 72 km northwest of Cusco. It served simultaneously as a r

ZD_2_14 — Autonomous Systems: Self-Driving Vehicles, Drones, and Safety-Critical AI

Autonomous systems are machines capable of performing complex tasks in unstructured, dynamic environments with limited or no human intervention — perceiving their environment through sensors, making decisions through com

S_4_10 — Space Elevators and Advanced Launch Technology

Space access remains the fundamental bottleneck for space development — current chemical rockets achieve orbit at $1,500–$5,000/kg to low Earth orbit (SpaceX Falcon 9, ~$2,700/kg; Starship aims for <$100/kg but is unprov

S_4_00 — Space Defense Risk: Subfolder Summary