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.
2,331 results for "Type Ia supernova" — page 68 of 117
E_1_07 — Tunguska Event and Modern Impact Evidence
On June 30, 1908, an atmospheric explosion over the Podkamennaya Tunguska River in central Siberia released energy equivalent to approximately 12 megatons of TNT (roughly 1,000 times the Hiroshima bomb), flattening 2,150
E_1_16 — Thera/Santorini Eruption: Detailed Analysis of the Minoan Catastrophe
The eruption of Thera (modern Santorini, Greece) was one of the largest volcanic events in the Holocene — estimated at VEI 6–7 (Volcanic Explosivity Index), ejecting approximately 30–80 km³ of magma (dense rock equivalen
E_1_06 — Chicxulub Impact and the K-Pg Boundary
Approximately 66 million years ago, at the boundary between the Cretaceous and Paleogene periods (K-Pg boundary, formerly K-T boundary), a ~10 km diameter asteroid struck what is now the Yucatán Peninsula of Mexico, crea
E_5_01 — Bronze Age Collapse: A Detailed Systems Analysis
The Late Bronze Age Collapse (c. 1200–1150 BCE) was one of history's most devastating civilizational catastrophes — a cascading multi-system failure that destroyed or severely diminished virtually every major palace-base
ZG_2_06 — Historical Linguistics and Language Family Classification
Historical linguistics is the scientific study of how languages change over time, how they are related to each other, and how they can be grouped into language families descended from common ancestors. The discipline's c
ZG_2_01 — Proto-Indo-European — Reconstruction, Homeland, and Migration
Proto-Indo-European (PIE) is the reconstructed common ancestor of the Indo-European language family — the most widely spoken language family on Earth, encompassing ~3.2 billion native speakers across branches including I
ZG_2_09 — Tok Pisin, Lingua Francas, and Global Contact Languages
A lingua franca (from medieval Italian — originally denoting the pidginized Romance-based trade language of the Mediterranean, the "Frankish tongue") is any language used as a common medium of communication between speak
ZG_2_14 — Historical Pragmatics: Speech Acts and Politeness Across Centuries
Historical pragmatics investigates how language use in context — speech acts, politeness strategies, discourse organization, implicature, and interpersonal meaning — has changed over time. Where historical linguistics tr
ZG_2_05 — Sacred Languages — Sanskrit, Hebrew, Arabic, Latin
Across civilizations, certain languages have been elevated above the ordinary functions of communication to the status of sacred or liturgical languages — vehicles believed to possess special power by virtue of their con
ZG_2_03 — Endangered Languages and Revitalization Movements
Of the approximately 7,000 languages spoken in the world today, linguists estimate that 40–50% are endangered — meaning they are no longer being learned by children and will likely cease to be spoken within one to two ge
ZG_2_19 — Creole Languages & Contact Linguistics
Creole languages — fully grammaticalized natural languages that arise from contact between speakers of mutually unintelligible languages — are among the most important phenomena in linguistics, bearing directly on fundam
ZG_2_07 — Dead Languages: Extinction, Documentation, and Revival
A dead language is one that no longer has any native speakers — no community transmits it to children as a first language through normal intergenerational communication. Of the approximately 7,000 languages spoken today,
ZG_2_17 — Ethiopic Ge'ez Script and Literary Tradition
Ge'ez (ግዕዝ) is the classical Semitic language and writing system of the Aksumite Empire (c. 100–940 CE) and the Ethiopian Orthodox Tewahedo Church, and the ancestor of the modern Ethiopic script (fidäl) used today for Am
ZG_2_12 — Language Contact and Substrate Effects in Ancient Civilizations
Language contact — the situation in which speakers of different languages interact and their languages influence one another — is one of the most powerful forces shaping linguistic change, and its effects are pervasive t
ZG_5_14 — First Contact Linguistics: Bridging Languages at Points of Meeting
First contact linguistics examines how humans have communicated at moments of initial encounter between peoples who share no common language — one of the most fundamental and recurring situations in human history. From p
ZG_5_06 — Lexicography: Dictionary Making from Johnson to Digital
Lexicography — the art and science of dictionary making — is among the oldest scholarly enterprises concerned with language, stretching from ancient Mesopotamian word lists (Sumerian-Akkadian bilingual glossaries, c. 230
ZG_5_10 — Internet Language: Emoji, Netlingo, and Digital Communication Pragmatics
Internet language — the varieties of written, spoken, and multimodal language shaped by digital communication technologies — represents one of the most rapid and widespread shifts in human communicative practice in histo
ZG_5_20 — Oracle Bones: Shang Dynasty Divination, Pyromancy, and the Origins of Chinese Writing
Oracle bones (jiǎgǔ 甲骨) are pieces of ox scapula and turtle plastron used for pyromantic divination during the Shang dynasty (c. 1600–1046 BCE), primarily at the royal capital Yinxu (殷墟) near modern Anyang, Henan Provinc
ZG_5_08 — Neurolinguistics: Broca, Wernicke, Imaging, and the Language Brain
Neurolinguistics — the study of the neural basis of language — investigates how the brain represents, processes, produces, and comprehends language, drawing on evidence from brain lesions (aphasia studies), electrophysio
ZG_5_21 — Indus Valley Script: The Undeciphered Writing System
The Indus Valley Script (also called the Harappan script) remains one of the last major undeciphered writing systems from the ancient world. [KEY FINDING] Used by the Indus Valley Civilization (c. 2600–1900 BCE) — one of
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