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.
198 results for "impact hypothesis" — page 6 of 10
G_2_03 — Bayesian Reasoning and Archaeological Inference
Bayesian reasoning — the systematic updating of probabilities for hypotheses as new evidence is acquired — has transformed archaeology, chronology, and the evaluation of disputed historical claims since the 1990s. At its
O_2_04 — Geological Hotspots and Mantle Plumes
Geological hotspots are locations where anomalously high volcanic activity occurs away from tectonic plate boundaries — the dominant hypothesis explains them as surface expressions of mantle plumes, columns of hot, buoya
O_3_05 — Rivers as Arteries — Freshwater Systems and Sacred Hydrology
Rivers have served as the circulatory system of human civilization since the earliest settlements along the Tigris-Euphrates, Nile, Indus, and Yellow River valleys. Across virtually every culture, rivers are not merely r
O_3_10 — Sargasso Sea and Ocean Gyres
Ocean gyres are large-scale, semi-permanent circular current systems driven by the interaction of wind stress, the Coriolis effect, and continental boundaries — there are five major subtropical gyres (North Atlantic, Sou
T_4_07 — Social Identity Theory and Prejudice
Social Identity Theory (SIT) explains how individuals derive self-concept from group memberships and how this drives intergroup behavior — including prejudice, discrimination, and conflict. Developed by Henri Tajfel and
T_2_07 — Psychology of Addiction
Addiction — compulsive engagement with a substance or behavior despite harmful consequences — is now understood as a chronic brain disorder involving neuroplastic changes in reward, motivation, memory, and executive cont
T_2_02 — Neurodiversity — Cognitive Variation as Adaptive Spectrum
The neurodiversity paradigm, articulated by sociologist Judy Singer in 1998, frames neurological differences—including autism, ADHD, dyslexia, synesthesia, Tourette syndrome, and other developmental conditions—not as pat
T_1_08 — Personality Psychology and the Big Five
Personality psychology seeks to understand individual differences in characteristic patterns of thinking, feeling, and behaving — and why these patterns remain relatively stable across time and situations.
T_1_19 — Depression: Neurobiology, Treatment Evolution & Cultural Perspectives
Major depressive disorder (MDD) — affecting approximately 280 million people worldwide (WHO, 2021) and ranking as the leading cause of disability globally — is a heterogeneous condition whose neurobiology remains incompl
T_1_02 — Evolutionary Psychology — The Adapted Mind
Evolutionary psychology applies Darwinian natural and sexual selection to the human mind, proposing that cognitive mechanisms evolved as functional adaptations to recurrent problems faced by ancestral hunter-gatherers in
T_1_07 — Emotion Theory and Affect
Emotion theory addresses one of psychology's most fundamental and contested questions: What are emotions, where do they come from, and how many are there?
T_3_19 — Feral Children, Linguistic Deprivation, and Critical Period Evidence
Feral children — individuals who grew up with minimal or no human contact during their early years — provide the most compelling (and tragic) natural evidence for the critical period hypothesis in language acquisition. T
T_5_25 — Cognitive Evolution: The Development of Human Mental Capacities
Cognitive evolution — the study of how human mental capacities emerged and developed over evolutionary time — addresses one of the deepest questions in science: how did a lineage of African primates develop language, sym
T_5_06 — Digital Psychology and Screen Time
Digital psychology examines how digital technologies — smartphones, social media, video games, internet use — affect cognition, emotion, social behavior, and mental health. The field has become intensely debated since th
D_2_21 — Black Sea Deluge: Archaeological Evidence for Rapid Flooding
The Black Sea Deluge Hypothesis proposes that the Black Sea — now a large saline body connected to the Mediterranean via the Bosporus Strait — was once a significantly smaller, lower freshwater lake during the Last Glaci
D_3_01 — Serpent Mound & Effigy Mounds
The Great Serpent Mound in Adams County, Ohio is the largest surviving effigy mound in the world at 1,348 feet (411 m), depicting a sinuous serpent with seven undulating curves and an egg-shaped feature at its head. It c
B_1_08 — Horned Deities: Pan, Cernunnos, Pashupati, and the Devil's Horns
Horned deities — divine or semi-divine beings depicted with animal horns or antlers — represent one of the most persistent and contested iconographic traditions in world religion. From the "Sorcerer" of Trois-Frères (c.
ZD_1_05 — Computational Complexity: P vs NP and the Limits of Efficient Computation
Computational complexity theory classifies problems not by whether they can be solved, but by how efficiently they can be solved — and its central open question, P vs NP, is one of the seven Clay Millennium Prize Problem
ZD_2_01 — Machine Learning Mathematics
Machine learning — the science of algorithms that improve through experience — rests on a rich mathematical foundation spanning optimization, statistics, linear algebra, probability, and functional analysis. The core mat
L_1_07 — Genetic Bottlenecks, Founder Effects, and Toba
Genetic bottlenecks — dramatic reductions in population size that slash genetic diversity — and founder effects — the reduced variation carried by small colonizing groups — have profoundly shaped the genomes of species f
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