RESEARCH BASE

Search 3,721 documents across 34 fields — every claim tier-rated by evidence

3,721 Documents 34 Sections 43,625 Citations 34,852 Keywords Indexed 4 Evidence Tiers

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.

2,439 results for "ur" — page 106 of 122

W_2_17 Verified World Civilizations

W_2_17 — Khmer Empire & Angkor Hydraulics

The Khmer Empire (c. 802–1431 CE), centered in modern Cambodia, was one of the most powerful and technologically sophisticated states in Southeast Asian history. Its capital, Greater Angkor, covered approximately 1,000 k

khmer-empire angkor-wat angkor-thom hydraulic-civilization baray water-management
W_2_11 Verified World Civilizations

W_2_11 — East Asian Ancestor Veneration Systems

Ancestor veneration — the ritual maintenance of relationships with deceased family members through offerings, prayers, and commemorative ceremonies — constitutes the deepest continuous layer of East Asian religious pract

ancestor veneration ancestral tablets spirit tablets zongci filial piety xiao
W_2_00 World Civilizations

W_2_00 — Asian Civilizations: Subfolder Summary

W_5_35 Credible World Civilizations

W_5_35 — I Ching: The Book of Changes, Divination, and Binary Philosophy

The I Ching (Yìjīng, 易經, "Classic of Changes") is among the oldest continuously used texts in human history, with roots extending to the Western Zhou dynasty (c. 1000–750 BCE) and legendary attribution to Fu Xi (trigrams

i ching yijing book of changes hexagrams divination binary system
W_5_37 Verified World Civilizations

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

House of Wisdom Bayt al-Hikma Baghdad Islamic Golden Age Abbasid Caliphate translation movement
W_5_36 Verified World Civilizations

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,

Shang dynasty Anyang oracle bones bronze casting Chinese civilization Yinxu
ZH_4_09 Verified Archaeoastronomy

ZH_4_09 — Astronomical Petroglyphs and Rock Art

Humans have carved, painted, and pecked celestial imagery into rock surfaces for at least 10,000 years — and possibly far longer. Astronomical petroglyphs and pictographs are found on every inhabited continent: images of

petroglyphs rock art archaeoastronomy supernova sun dagger star maps
ZH_0_00 Archaeoastronomy

ZH_0_00 — Archaeoastronomy & Celestial Knowledge: Section Summary

ZH_3_04 Verified Archaeoastronomy

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

Chaco Canyon Sun Dagger Fajada Butte Pueblo Bonito Great Houses solstice
ZH_3_10 Verified Archaeoastronomy

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)

Cahokia mound builders Woodhenge Newark Earthworks Poverty Point Hopewell
ZH_3_12 Credible Archaeoastronomy

ZH_3_12 — South American Archaeoastronomy Beyond the Inca

While the Inca astronomical tradition (the ceque system, the Intihuatana, and the dark-cloud constellations of the Milky Way) is the most thoroughly studied in South America, numerous pre-Inca and non-Inca civilizations

South American astronomy Nazca Chimú Muisca Tiwanaku Chavín
ZH_3_07 Verified Archaeoastronomy

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

Micronesia stick charts Marshall Islands rebbelib mattang meddo
ZH_3_18 Credible Archaeoastronomy

ZH_3_18 — Polynesian Star Navigation and Wayfinding

Polynesian star navigation is the non-instrument celestial wayfinding system that enabled the colonization of the Polynesian Triangle — the vast oceanic region bounded by Hawaiʻi, Rapa Nui (Easter Island), and Aotearoa (

polynesian-navigation celestial-navigation wayfinding star-compass oceanic-voyaging hokulea
ZH_3_00 Archaeoastronomy

ZH_3_00 — Americas Pacific Indigenous: Subfolder Summary

ZH_3_03 Verified Archaeoastronomy

ZH_3_03 — Aboriginal Australian Astronomy: Seasonal Star Knowledge

Australian Aboriginal peoples developed one of the oldest continuous astronomical traditions on Earth — an integrated system of sky knowledge extending back at least 50,000 years of habitation on the Australian continent

Aboriginal Australian astronomy ethnoastronomy songlines Dreaming Emu in the Sky dark constellation
ZH_5_09 Credible Archaeoastronomy

ZH_5_09 — Ancient Observatories: Kokino, Goseck, and Pre-Stonehenge Horizon Sites

Stonehenge is the world's most famous archaeoastronomical site — but it is neither the earliest nor the only ancient structure demonstrating systematic astronomical observation. Across Europe, the Near East, and Africa,

ancient observatory Goseck circle Kokino horizon site Neolithic astronomy pre-Stonehenge
ZH_5_07 Verified Archaeoastronomy

ZH_5_07 — Light and Shadow Hierophanies: Temple Sun Daggers and Solar Inserts

A hierophany — a manifestation of the sacred — is realized in some of the world's most famous ancient structures through the precise interplay of light and shadow. On specific calendar dates — typically solstices, equino

hierophany Sun dagger light and shadow solar insert equinox solstice
ZH_5_00 Archaeoastronomy

ZH_5_00 — Methods Modern Archaeoastronomy: Subfolder Summary

ZH_5_11 Credible Archaeoastronomy

ZH_5_11 — Solar Eclipse as Political Event: Thales, Omens, and Dynastic Legitimacy

Throughout history, solar eclipses — sudden, dramatic, and seemingly unnatural — have been interpreted not merely as astronomical events but as political signs, divine warnings, and instruments of power. The most famous

solar eclipse political event omen Thales eclipse prediction dynastic legitimacy
ZH_5_14 Verified Archaeoastronomy

ZH_5_14 — Dark Sky Preservation: Light Pollution and Heritage Night Skies

Light pollution — the excessive, misdirected, or obtrusive artificial light that brightens the night sky — has transformed humanity's relationship with the stars more profoundly than any development since the invention o

light pollution dark sky skyglow IDA International Dark-Sky Association DarkSky International