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.

45 results for "bilaterian common ancestor" — page 3 of 3

R_4_03 Verified Biology & Evolution

R_4_03 — Nervous System Evolution: From Nerve Nets to Brains

The nervous system — the most complex organ system in animals — evolved once (possibly twice) from electrically excitable cells in the common ancestor of bilaterians and cnidarians, approximately 600–700 million years ag

nervous system evolution neuron nerve net centralization cephalization brain
S_3_13 Verified Future Technology

S_3_13 — Nuclear Fusion Progress: ITER, NIF Ignition, and Compact Tokamaks

Nuclear fusion — the process powering stars, in which light atomic nuclei combine to form heavier nuclei and release enormous energy — has been pursued as a potential source of virtually unlimited, clean energy since the

nuclear fusion tokamak stellarator ITER NIF ignition
F_3_18 Verified Lost Connections

F_3_18 — Vavilov Centers: Origins of Cultivated Plants

The Vavilov centers of origin are the regions of the world where the greatest genetic diversity of cultivated plants and their wild relatives is found — identified by the Russian/Soviet botanist, geneticist, and plant ge

Vavilov center of origin center of diversity cultivated plants crop wild ancestor
ZC_4_21 Credible Social Science

ZC_4_21 — Gift Economy Systems

The gift economy — a system of exchange in which goods and services are given without explicit agreement for immediate or future reward, creating obligations of reciprocity that bind individuals and communities — represe

gift economy reciprocity Marcel Mauss potlatch kula ring generalized reciprocity
B_4_13 Verified Beings & Entities

B_4_13 — Guardian Spirits: Lares, Genius Loci, Fylgja, Ka

Guardian spirits — supernatural entities that protect persons, families, places, or communities — represent one of the most universal categories in world religion, bridging animism, ancestor worship, and monotheistic ang

guardian spirit lares penates genius loci fylgja hamingja