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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.
3,665 results for "P vs NP" — page 154 of 184
ZH_3_11 — Arctic and Subarctic Astronomy: Inuit, Sámi, Siberian
The astronomy of Arctic and subarctic peoples — including the Inuit (across Canada, Alaska, and Greenland), Sámi (Fennoscandia), and Siberian cultures (Chukchi, Evenki, Yakut, and others) — represents adaptation to one o
ZH_3_08 — Archaeoastronomy of Mesoamerica: Teotihuacan, Monte Albán
Mesoamerican archaeoastronomy encompasses the astronomical knowledge and celestial alignments embedded in the architecture, urban planning, calendrical systems, and ritual practices of civilizations from central Mexico t
ZH_3_22 — Medicine Wheel Astronomy
Medicine wheels are large stone structures found across the northern Great Plains and Rocky Mountain front ranges of North America, from Wyoming and Montana to Saskatchewan and Alberta, consisting of central cairns with
ZH_3_15 — Norse Astronomy: Sunstones, Aurvandil's Toe, and Viking Celestial Navigation
The Norse/Viking world (c. 800–1100 CE) developed a distinctive astronomical culture shaped by extreme northern latitudes — long summer days with no true darkness, short winter days with extended night, the aurora boreal
ZH_3_14 — Nighttime Navigation Without Instruments: Stars, Moon, and Memory
For most of human history, navigators crossing deserts, oceans, and arctic wastes found their way using the stars, the Moon, the Sun's position, and memory — without magnetic compasses, chronometers, or sextants. Non-ins
ZH_5_06 — Horizon Astronomy: Skyline Observations, Foresights, and Horizonal Calendars
Horizon astronomy — the practice of observing where celestial bodies rise and set along the natural skyline — is the most ancient, most widespread, and most practical form of astronomical observation. Unlike meridian tra
ZH_5_18 — Enuma Anu Enlil: Babylonian Celestial Omen Series and Astral Science
The Enuma Anu Enlil ("When Anu and Enlil...") is the most extensive celestial omen series from ancient Mesopotamia — comprising approximately 70 tablets containing some 7,000 omen entries. The series was compiled during
ZH_5_03 — Modern Archaeoastronomy: GIS, LiDAR, and Digital Methods
Modern archaeoastronomy has been transformed by the adoption of Geographic Information Systems (GIS), Light Detection and Ranging (LiDAR), digital elevation models (DEM), planetarium software (Stellarium, TheSkyX), photo
ZH_5_20 — Maya Calendar Systems: Cycles of Time and Cosmic Order
The Maya calendar system represents one of the most sophisticated timekeeping frameworks developed by any civilization, integrating multiple interlocking cycles to track sacred, civil, agricultural, and cosmic time over
ZH_2_14 — Iatromathematics: Zodiac Man, Medical Astrology, and Celestial Healing
Iatromathematics (Greek: iatros = healer + mathēmatikos = astrologer/mathematician) was the systematic integration of astrology with medical diagnosis and treatment — a dominant medical paradigm in the Western world from
ZH_2_11 — Southeast Asian Astronomy: Thai, Burmese, Khmer, and Indonesian Traditions
The astronomical traditions of Southeast Asia — Thailand (Siam), Myanmar (Burma), Cambodia (Khmer), Java, Bali, and the wider Malay-Indonesian archipelago — represent a distinctive synthesis of Indian, indigenous, and (i
ZH_2_02 — Indian Astronomical Traditions: Aryabhata to Jantar Mantar
Indian astronomy (Jyotish Shastra) constitutes one of the most mathematically sophisticated astronomical traditions of the pre-modern world, spanning from the Vedic period (c. 1500–500 BCE) through the classical siddhānt
ZH_2_10 — Astronomical Alignments in Medieval Architecture: Cathedrals and Mosques
Medieval cathedrals and mosques — two of the most ambitious architectural traditions in history — both incorporate astronomical considerations into their design, though in different ways and for different reasons. Christ
ZH_2_03 — Islamic Golden Age Astronomy: Observatories and Star Catalogs
Islamic astronomy (c. 750–1500 CE) represents one of the most productive and sophisticated periods in the history of astronomical science — a sustained tradition of observation, mathematical innovation, and critical enga
ZH_2_06 — Astronomy in the Rig Veda and Early Indian Texts
The Rig Veda — the oldest of the four Vedas and among the oldest religious texts still in continuous use (~1500–1200 BCE, though dating is debated) — contains hymns, references, and cosmological imagery that reflect the
ZH_2_08 — Astronomical Dating of Ancient Texts and Events
Astronomical dating — the use of recorded or described celestial events (eclipses, planetary conjunctions, solstice positions, heliacal risings, and precessional indicators) to fix the absolute dates of ancient texts and
ZH_1_01 — Archaeoastronomy: Discipline, Debates, and Cultural Astronomy
Archaeoastronomy is the interdisciplinary study of how past cultures understood, used, and integrated celestial phenomena — the motions of the sun, moon, planets, and stars — into their architecture, ritual practices, ag
ZH_1_13 — Bronze Age Astronomy: Alignments, Calendars, and Knowledge 2000–1000 BCE
The Bronze Age (broadly ~3300–1200 BCE, with regional variation) witnessed a decisive transformation in astronomical knowledge — from the horizon-based, monument-encoded astronomy of the Neolithic to the beginning of sys
ZH_1_19 — Origins of the Zodiac
The zodiac — the band of ~8° on either side of the ecliptic (the Sun's apparent annual path across the sky) divided into 12 equal 30° segments, each named after a constellation — originated in Mesopotamian astronomy duri
ZH_1_12 — Astronomical Instruments: Astrolabe, Armillary, Quadrant
The history of astronomical instruments — devices for measuring the positions, motions, and timing of celestial bodies — is inseparable from the history of astronomy itself. From the gnomon (the simplest shadow-casting s
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