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.
110 results for "universal common ancestor" — page 1 of 6
Z_4_07 — The Tree of Life: Molecular Phylogenetics and Universal Ancestry
The Tree of Life — the branching diagram representing the evolutionary relationships among all living organisms — has been fundamentally reshaped by molecular phylogenetics, the reconstruction of evolutionary history usi
Q_3_09 — Astrobiology and Origin of Life in Space
Astrobiology — the study of the origin, evolution, distribution, and future of life in the universe — sits at the intersection of biology, chemistry, planetary science, and astronomy. The central question — "Are we alone
C_4_03 — Yoruba Ogun and Divine Smiths Across Cultures
Every major culture on Earth attributes the invention of metalworking to a divine or supernatural being — a pattern so universal it must reflect something fundamental about the human relationship with metallurgy. The Yor
K_3_07 — Evolution of Consciousness
The question of when, how, and why consciousness evolved is one of the deepest unsolved problems at the intersection of biology, neuroscience, and philosophy. Two major recent proposals have attempted to identify the evo
ZG_3_20 — Pirahã & Universal Grammar Debate
The Pirahã people — a small indigenous group of approximately 400–800 individuals living along the Maici River in the Brazilian Amazon — and their language have become the center of one of the most consequential debates
INTERDOC_11 — Mitochondrial Eve, Y-Chromosomal Adam, and the Convergence Problem
Mitochondrial Eve — the most recent common ancestor (MRCA) of all living humans through an unbroken maternal line — was identified through mtDNA analysis by Rebecca Cann, Mark Stoneking, and Allan Wilson at UC Berkeley i
ZC_3_20 — Universal Basic Income
Universal Basic Income (UBI) — a periodic cash payment delivered unconditionally to all members of a political community, without means-testing or work requirements — has moved from the fringes of economic debate to main
ZC_3_23 — Commons Governance — Ostrom
Elinor Ostrom (1933–2012), professor of political science at Indiana University Bloomington, became the first woman to receive the Nobel Memorial Prize in Economic Sciences (2009) for her groundbreaking work demonstratin
L_1_03 — Mitochondrial Eve, Y-Chromosomal Adam & Population Origins
Mitochondrial Eve and Y-chromosomal Adam are the most recent common ancestors of all living humans along strictly maternal and strictly paternal lines. They were not the first woman and man, were not a couple, and do not
R_2_10 — Primate Evolution and the Hominid Lineage
The order Primates, originating ~65–80 million years ago, encompasses prosimians (lemurs, tarsiers), monkeys, and apes. The human lineage (Hominini) diverged from the chimpanzee lineage ~6–7 Mya, based on molecular clock
U_5_24 — Totemism: Animal Ancestors, Sacred Kinship, and Species Identity
Totemism is a system of belief and social organization in which human groups maintain spiritual, ancestral, or kinship relationships with natural species, objects, or phenomena (the "totem"). First documented systematica
U_5_23 — Music: Origins, Neuroscience, and Cross-Cultural Universals
Music is a universal human behavior — no known culture lacks it — yet its evolutionary origins, neurological basis, and cross-cultural structures remain among the most debated topics in cognitive science, anthropology, a
W_2_06 — Sikh Tradition — Guru Nanak, Adi Granth, and Universal Brotherhood
Sikhism, founded by Guru Nanak (1469–1539 CE) in the Punjab region, is the youngest of the world's major religions and among the most radical in its rejection of caste hierarchy, gender inequality, and empty ritual. Its
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
C_5_16 — Animal Totemism: Species as Identity, Ancestor, and Guide
Totemism — the system of belief and practice in which a social group (clan, moiety, or individual) maintains a special spiritual, ancestral, or symbolic relationship with a natural species or phenomenon — has been one of
ZG_3_06 — Typology and Language Universals
Linguistic typology is the systematic study of structural similarities and differences across the world's languages — asking what properties are universal (shared by all or nearly all languages), what properties are vari
ZC_1_03 — Cross-Cultural Psychology — Universal vs Culture-Specific Mind
Cross-cultural psychology investigates how cultural contexts shape psychological processes and whether any mental phenomena are truly universal. The central tension—between universal human nature (etic perspective) and c
B_4_05 — Ancestor Spirits and Ancestral Worship Traditions
Ancestor veneration is arguably the most universal religious practice in human history, attested in every inhabited continent from the Neolithic onward. It rests on a shared premise: the dead do not disappear but persist
ZD_5_09 — Open Source: Free Software, Collaborative Development, and Commons-Based Production
Open source software (OSS) is software whose source code is publicly available, can be freely used, modified, and redistributed under licenses that preserve these freedoms. Open source is one of the most consequential mo
P_4_02 — Perennial Philosophy and Universal Wisdom
The Perennial Philosophy — philosophia perennis — is the thesis that beneath the surface diversity of the world's religious and spiritual traditions lies a SINGLE, universal truth about the nature of reality and human ex
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