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.
100 results for "yin yang" — page 3 of 5
U_1_16 — Gamelan: Indonesian Bronze Orchestra Tradition
Gamelan — from the Javanese word gamel ("to hammer") — is the collective term for the bronze percussion orchestra traditions of Java, Bali, and neighboring Indonesian islands, representing one of the world's most acousti
U_4_10 — Puppetry and Automata
Puppetry — the animation of inanimate figures to tell stories — is among the oldest performing arts, predating written drama. Shadow puppets: wayang kulit (Indonesia — intricately carved leather puppets cast against a ba
X_4_13 — Palliative Care and Hospice: Medicine at the End of Life
Palliative care — specialized medical care focused on providing relief from the symptoms, pain, and stress of serious illness, with the goal of improving quality of life for both the patient and the family — and hospice
W_4_03 — Andean Civilizations — Chavín, Nazca, Tiwanaku, Caral
The Andean region produced one of the world's great independent civilizations — arguably the most underappreciated. From Caral (~3000 BCE, contemporary with Egyptian pyramids and Sumerian Ur) to the Inca (conquered by Sp
W_3_01 — Bantu Cosmology, Migration, and Iron Traditions
The Bantu expansion (~3000 BCE–500 CE) is one of the largest and most consequential human migrations in history: speakers of proto-Bantu languages from the Nigeria-Cameroon borderland spread across most of sub-Saharan Af
W_2_19 — Shang & Zhou Dynasty Bronze Civilization
The Shang (c. 1600–1046 BCE) and Western Zhou (c. 1046–771 BCE) dynasties represent the formative period of Chinese civilization, producing the world's most sophisticated bronze technology, the earliest Chinese writing s
W_2_04 — Tibetan Buddhism, Bön, and Hidden Knowledge (Terma)
Tibet's religious traditions represent one of the world's most elaborate systems for the exploration and mapping of consciousness states — from the Six Yogas of Naropa to the Dzogchen practices of pristine awareness, fro
C_4_16 — Zulu and Southern African Cosmologies
Zulu and broader Southern African cosmologies constitute one of the richest and most dynamic indigenous religious systems on the African continent, rooted in Bantu-speaking peoples' migrations into the region over the pa
C_4_08 — Philippine Mythology and Anito Traditions
The Philippines — an archipelago of 7,641 islands in Southeast Asia — possesses one of the richest and most diverse mythological traditions in the world, encompassing hundreds of ethnolinguistic groups (Tagalog, Visayan,
C_5_07 — Hittite and Hurrian Mythology — Kumarbi Cycle
The Hittite and Hurrian mythological traditions, preserved on cuneiform tablets from Hattusa (modern Boğazköy, Turkey), provide the crucial "missing link" between Mesopotamian and Greek mythology. The Kumarbi Cycle — a H
E_3_01 — Rise and Fall of Civilizations
Every complex civilization in recorded history has collapsed or been transformed beyond recognition. The Bronze Age collapse (~1177 BCE) destroyed the interconnected civilizations of the eastern Mediterranean within a si
ZG_5_04 — Writing System Reform: Simplified Chinese, Turkish Latin, Hangul
Writing system reforms — deliberate, planned changes to a language's script, orthography, or writing conventions — represent some of the most dramatic and consequential acts of language planning in history. Three landmar
ZG_3_11 — Phonology: Sound Systems, Distinctive Features, and Phonological Rules
Phonology — the branch of linguistics concerned with the systematic organization of speech sounds in natural languages — studies not the physical sounds themselves (that is phonetics) but the abstract cognitive system by
J_3_06 — Megalithic Construction Techniques
The quarrying, transport, and erection of megaliths — large stone blocks ranging from several tons to over 1,000 tons — is one of the most impressive and debated aspects of ancient engineering. Major megalithic achieveme
J_1_08 — Ancient Optics, Lenses, and Light Technology
Ancient civilizations possessed a greater understanding of optics and light than is commonly recognized. Archaeological evidence includes polished crystal lenses (the Nimrud lens, ~750 BCE; Visby lenses, ~11th c. CE), so
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_15 — Ancient Preservation Technology: Mummification, Pickling, and Food Storage
The ability to preserve organic materials — preventing or slowing the decomposition of food, human remains, and biological products — was essential to the functioning of ancient civilizations, enabling food security acro
J_2_07 — Ancient Leather, Parchment, and Hide Technology
Leather and parchment — materials produced by the chemical and physical transformation of animal hides and skins — are among humanity's oldest and most versatile manufactured materials, with evidence of hide processing (
J_2_04 — Ancient Ceramics and Pottery Technology
Ceramics represent humanity's oldest synthetic material, with the earliest known fired-clay vessels — Jōmon pottery from Japan — dated to c. 16,500 BP (Odai Yamamoto site; Kuzmin, 2006), predating agriculture by thousand
J_5_06 — Ancient Measurement Standards and Metrology
Standardized measurement — of length, weight, volume, area, and angle — was fundamental to ancient engineering, trade, taxation, land surveying, and astronomical observation. Every major civilization developed metrologic
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