RESEARCH BASE
Search 3,721 documents across 34 fields — every claim tier-rated by evidence
3,633 are the core, quality-scored corpus (34 lettered sections — see How We Work); the remaining 88 are cross-corpus synthesis documents (68 InterDocs, 12 Connections, 8 Theories) also indexed here.
951 results for "Saharan rock art" — page 7 of 48
ZH_3_07 — Celestial Navigation in the Pacific: Micronesian Stick Charts
The peoples of Micronesia — particularly the Marshall Islands and the Caroline Islands — developed some of the most sophisticated non-instrument navigation systems in human history. While Polynesian navigation (covered i
C_4_19 — The Labyrinth as Ritual Pathway: From Knossos to Chartres
The labyrinth — a single-path (unicursal) design leading to a center and back — is one of humanity's most persistent geometric-symbolic forms, appearing across at least 4,000 years and five continents. Distinct from the
C_5_08 — Armenian Mythology and the Urartian Connection
- [Quick Summary](#quick-summary)
ZF_5_11 — Abyssal Plains: Earth's Flattest Terrain and Deep Sedimentation
Abyssal plains — vast, flat expanses of sea floor at depths of 3,000–6,000 meters — are the largest habitat on Earth, covering approximately 54% of the planet's surface (more than all continents combined), yet they remai
K_2_15 — Glial Cells and the Tripartite Synapse: The Brain's Other Half
Glial cells (neuroglia) — comprising astrocytes, oligodendrocytes, microglia, and NG2 glia in the central nervous system, plus Schwann cells and satellite cells in the peripheral nervous system — constitute approximately
E_3_11 — Earthquake Archaeology and Seismic Catastrophes
Archaeoseismology — the study of past earthquakes using archaeological evidence — reveals that seismic catastrophes have repeatedly destroyed, reshaped, and sometimes permanently ended ancient urban centers and entire ci
E_3_21 — The 5.9 Kiloyear Event: Saharan Desiccation & the Birth of River Civilizations
The 5.9 kiloyear event (c. 3900 BCE) marks the terminal phase of the African Humid Period — a 6,000-year interval during which the Sahara was a grassland savanna supporting abundant lakes, rivers, and human populations.
E_2_11 — Snowball Earth Hypothesis
The Snowball Earth hypothesis proposes that Earth's surface was entirely or nearly entirely covered by ice on at least two occasions during the Neoproterozoic era (c. 720–635 million years ago): the Sturtian glaciation (
E_1_04 — Complete Meteor & Asteroid Impact Catalog: Earth's Full Bombardment History
This document examines Complete Meteor & Asteroid Impact Catalog: Earth's Full Bombardment History, a topic within the Cataclysms and Chronology research area. Key areas of investigation include Theia Giant Impact (~4.51
E_1_02 — Meteor and Asteroid Impacts on Earth
This document examines Meteor and Asteroid Impacts on Earth, a topic within the Cataclysms and Chronology research area. Notable findings include: The Finnish Kalevala describes a "fire-child" stolen from heaven that bur
J_2_20 — Zhang Heng's Seismoscope: Ancient Chinese Earthquake Detection
In 132 CE, during the reign of Emperor Shun of Han, the Chinese polymath Zhang Heng (張衡, 78–139 CE) constructed the world's first known instrument for detecting distant earthquakes — the houfeng didong yi (候風地動儀), litera
J_2_22 — Terra Preta: Amazonian Dark Earth and Ancient Soil Engineering
Terra preta (Portuguese for "black earth") — scientifically termed Amazonian Dark Earth (ADE) — is a remarkably fertile, human-created soil found in patches throughout the Amazon Basin, primarily in Brazil but also in Co
J_2_17 — Sub-Saharan African Iron Smelting
Sub-Saharan Africa has one of the longest and most complex traditions of iron smelting in the world, with evidence dating to at least 2500–2000 BCE in parts of Central and West Africa — potentially predating iron use in
J_5_09 — Ancient Cartography and Mapmaking
The representation of geographical space in graphic form — cartography — is attested from deep antiquity and represents a fundamental intellectual achievement: the abstraction of three-dimensional lived space into two-di
ZB_5_15 — Citizen Science in Ecology: Participatory Research and Large-Scale Biodiversity Monitoring
Citizen science — the participation of non-professional volunteers in scientific research — has become an indispensable component of modern ecology, generating datasets of unprecedented spatial and temporal scale that no
ZB_5_20 — Citizen Science: Public Participation in Scientific Research
Citizen science — also termed community science, participatory science, or public participation in scientific research (PPSR) — involves non-professional volunteers in systematic data collection, analysis, or interpretat
ZB_3_12 — Soil Ecology: The Living Skin of the Earth
Soil — far from inert dirt — is the most biologically diverse habitat on Earth, containing an estimated 25–30% of all species on the planet. A single gram of healthy soil harbors approximately 1 billion bacteria (from 10
G_4_03 — Ball Lightning, Earthquake Lights, and Anomalous Atmospheric Phenomena
Ball lightning — glowing, roughly spherical objects that float through the air, pass through walls, and sometimes explode — has been reported for centuries by thousands of witnesses, including scientists, airline pilots,
O_1_18 — Ball Lightning and Earthquake Lights: Transient Luminous Phenomena
Ball lightning — a luminous, roughly spherical phenomenon observed during or near thunderstorms, typically 10–50 cm in diameter and lasting 1–10 seconds — and earthquake lights (EQLs) — luminous atmospheric phenomena obs
D_2_11 — Abu Simbel: Ramesses II and Solar Engineering
Abu Simbel — twin rock-cut temples on the western bank of the Nile in southern Egypt (Nubia), near the modern border with Sudan — represents the apex of pharaonic monumental engineering and one of the most spectacular so
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