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.
1,188 results for "3" — page 17 of 60
W_5_23 — Viking Expansion: Detailed Analysis
The Viking Age (c. 793–1066 CE) was a period of dramatic Scandinavian expansion during which Norse seafarers, warriors, traders, and settlers from Denmark, Norway, and Sweden extended their reach across an astonishing ge
W_5_34 — Late Bronze Age Collapse: Systems Failure in the Ancient Mediterranean
Between approximately 1200 and 1150 BCE, every major civilization in the Eastern Mediterranean collapsed or suffered catastrophic decline within a single generation. The Mycenaean palatial system, the Hittite Empire, the
W_5_37 — The House of Wisdom: Baghdad and the Islamic Golden Age of Knowledge
The House of Wisdom (Bayt al-Ḥikma) was a major intellectual institution in Baghdad during the Abbasid Caliphate (est. c. 762 CE), reaching its zenith under Caliph al-Maʾmūn (r. 813–833 CE). While its exact nature — libr
W_5_33 — Khazar Khaganate: Turkic Empire and Religious Conversion
The Khazar Khaganate (c. 650–1048 CE) was a major Turkic empire that dominated the steppe and steppe-forest region between the Caspian Sea, the Black Sea, the Caucasus Mountains, and the Volga River — controlling key seg
W_5_03 — Mongol Tengrism and Central Asian Shamanism
Tengrism is one of the world's oldest continually practiced sky-god religions, centered on Möngke Tengri ("Eternal Blue Sky") as the supreme cosmic deity. Originating among the Turkic-Mongol peoples of the Central Asian
W_5_31 — Muisca Confederation and El Dorado
The Muisca (also called Chibcha) confederation occupied the high-altitude plateaus of the Eastern Cordillera of Colombia (2,600 m elevation, modern Boyacá and Cundinamarca departments) and represents one of the most comp
W_5_36 — Shang Dynasty: Bronze Age China and the Foundations of Chinese Civilization
The Shang dynasty (c. 1600–1046 BCE) is the earliest Chinese dynasty confirmed by both archaeological evidence and written records, representing the foundational period of Chinese civilization. Centered at Anyang (Yinxu,
W_5_13 — Mississippian Decline: Cahokia Collapse and Abandonment Theories
Cahokia — the largest pre-Columbian city north of Mexico, located in the American Bottom floodplain of the Mississippi River near modern-day St. Louis, Missouri/East St. Louis, Illinois — rose rapidly around 1050 CE to b
W_5_30 — Lambayeque and Sicán Culture: Lords of the Northern Coast
The Lambayeque (or Sicán) culture (~750–1375 CE) was a wealthy, metallurgically advanced civilization of Peru's north coast that succeeded the Moche and preceded the Chimú in the Lambayeque Valley. Discovered through sys
ZH_4_13 — African Stellar Calendars: Borana, Mursi, Tswana
African stellar calendars represent some of the most sophisticated naked-eye observational systems in the ethnographic record, yet remain among the least studied in archaeoastronomy — a gap that reflects colonial biases
ZH_4_03 — Star Myths and Constellation Stories Across Cultures
Every human culture that has observed the night sky has organized the visible stars into patterns — constellations, asterisms, and star groups — and woven them into narrative frameworks that encode cosmological beliefs,
ZH_3_02 — Polynesian Celestial Navigation: Star Compass and Wayfinding
The peoples of Polynesia — spread across the vast Polynesian Triangle (Hawaiʻi, Rapa Nui/Easter Island, Aotearoa/New Zealand), the largest ocean-spanning cultural region on Earth — accomplished the most remarkable feat o
ZH_3_06 — Andean Dark Constellations and Milky Way Astronomy
Andean astronomical traditions, particularly as documented in Quechua-speaking communities of Peru and Bolivia and inferred from colonial-era Spanish accounts of Inca cosmology, are distinguished by a feature unique in w
ZH_3_16 — Polynesian Star Compass: Celestial Navigation of the Pacific
The Polynesian star compass represents one of humanity's most sophisticated non-instrument navigation systems — enabling deliberate, repeatable voyages across thousands of miles of open Pacific Ocean centuries before Eur
ZH_3_17 — Amazonian Astronomical Traditions
Amazonian indigenous astronomical traditions represent some of the least-documented but most sophisticated non-Western star knowledge systems, integrating stellar observation with ecological management, seasonal agricult
ZH_3_19 — Inca Astronomy and Ceque System
Inca astronomy represents one of the most sophisticated indigenous astronomical traditions of the Americas, deeply embedded in the spatial, ritual, and agricultural organization of the Tawantinsuyu (Inca Empire, ~1438–15
ZH_3_04 — Chaco Canyon: Solar Markers and Pueblo Astronomy
Chaco Canyon (northwestern New Mexico) was the center of Ancestral Puebloan (formerly called Anasazi) civilization from approximately 850–1150 CE, featuring monumental Great Houses containing hundreds of rooms, extensive
ZH_3_05 — Nazca Lines: Astronomical and Ecological Hypotheses
The Nazca Lines are a vast complex of geoglyphs — ground drawings created by removing the dark, iron-oxide-coated desert pavement to reveal the lighter ground beneath — spread across the arid Pampa de Nazca and surroundi
ZH_3_23 — Maya Venus Observations
The ancient Maya developed the most precise pre-telescopic observations of Venus in the world, culminating in the Venus Table (pages 24 and 46–50) of the Dresden Codex — a Late Postclassic manuscript (~13th–14th century
ZH_3_10 — North American Mound Builders and Celestial Alignments
The mound-building cultures of eastern North America — spanning from Poverty Point (~1700 BCE) through the Adena (~800–100 BCE), Hopewell (~100 BCE–500 CE), Fort Ancient (~1000–1650 CE), and Mississippian (~800–1500 CE)
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