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.
2,322 results for "Man the Hunter" — page 88 of 117
R_3_07 — Embryology and Morphogenesis: How Bodies Take Shape
Embryology — the study of how a single fertilized cell becomes a complex multicellular organism — is one of biology's most profound mysteries. From the discovery by Karl Ernst von Baer (1828) that embryos of different sp
R_3_01 — Epigenetics and Ancestral Memory
Epigenetics — heritable changes in gene expression WITHOUT changes to the DNA sequence — has revolutionized biology over the past two decades. Your genes are the hardware; epigenetics is the software that determines whic
R_3_17 — Neoteny & Heterochrony: Developmental Timing in Evolution
Heterochrony — evolutionary change in the timing or rate of developmental processes — is one of the most powerful mechanisms by which organisms evolve new morphologies without requiring entirely new genetic programs. The
R_3_12 — Evolution of Sex and Reproduction
Sex — the rearrangement of genetic material from two parents to produce genetically unique offspring — is one of the most fundamental yet puzzling features of life. Sexual reproduction involves enormous costs: the "twofo
R_3_05 — Coevolution — Arms Races, Mutualisms, and Red Queens
Coevolution — reciprocal evolutionary change between interacting species — is one of the most powerful engines of biological diversity. Leigh Van Valen's Red Queen hypothesis (1973) captured its essence: species must con
R_5_11 — Coral Biology: Symbiosis, Bleaching, and Reef Building
Coral reefs — often called the "rainforests of the sea" — are among Earth's most biodiverse and productive ecosystems, occupying less than 0.1% of the ocean floor yet supporting approximately 25% of all marine species. T
R_2_13 — Mammalian Radiation: Post-Cretaceous Diversification
The Cretaceous-Paleogene (K-Pg) mass extinction 66 million years ago — triggered by an asteroid impact and possibly exacerbated by Deccan Traps volcanism — eliminated the non-avian dinosaurs and opened vast ecological ni
R_2_12 — Tool Use in Animals: Corvids, Primates, Dolphins, and Cognitive Evolution
Tool use — the employment of an external object to alter the form, position, or condition of another object or organism — was once considered uniquely human, a defining cognitive threshold separating Homo sapiens from al
R_2_11 — Convergent Evolution: Parallel Solutions Across Lineages
Convergent evolution — the independent origin of similar features in unrelated lineages — is one of the most striking patterns in the history of life, suggesting that natural selection repeatedly discovers the same "solu
R_2_15 — Neoteny and Heterochrony in Human Evolution
Heterochrony — evolutionary change in the timing or rate of developmental processes — is one of the most powerful mechanisms by which evolution generates morphological diversity without requiring new genes. [KEY FINDING]
R_1_05 — Quantum Biology
Until recently, quantum effects were thought impossible in warm, wet biological systems. The standard assumption held that thermal noise at physiological temperatures (~310 K) would destroy quantum coherence within femto
R_1_18 — Mass Extinction Periodicity
The question of whether mass extinctions follow a periodic pattern — recurring at regular intervals driven by astronomical or geological cycles — has been one of the most provocative and contentious hypotheses in paleont
R_1_06 — Symbiogenesis — Lynn Margulis and Cooperative Evolution
Symbiogenesis — the evolutionary origin of new organisms, organelles, or metabolic capabilities through the permanent merger of previously independent life forms — is one of the most consequential biological discoveries
S_4_10 — Space Elevators and Advanced Launch Technology
Space access remains the fundamental bottleneck for space development — current chemical rockets achieve orbit at $1,500–$5,000/kg to low Earth orbit (SpaceX Falcon 9, ~$2,700/kg; Starship aims for <$100/kg but is unprov
S_4_05 — Asteroid Deflection and Planetary Defense
Asteroid and comet impacts represent the only existential risk with a proven extinction track record — the Chicxulub impact 66 million years ago ended the Cretaceous and eliminated ~75% of species including non-avian din
S_4_01 — Existential Risk Taxonomy
Existential risk (x-risk) refers to any event that could permanently curtail humanity's long-term potential — including extinction, civilizational collapse without recovery, or irreversible loss of value (e.g., permanent
S_4_04 — Pandemic Risk — Ancient Plagues, Antibiotic Resistance, and Biosecurity
Pandemics have repeatedly reshaped human civilization, from the Plague of Justinian (541 CE, ~25-50 million dead, Yersinia pestis confirmed via ancient DNA) to the Black Death (1347-1353, killing 30-60% of Europe's popul
S_4_19 — Dyson Sphere Engineering
A Dyson sphere is a hypothetical megastructure that encompasses an entire star to capture a substantial fraction of its energy output — representing the ultimate engineering achievement of a technologically advanced civi
S_4_15 — Smart Grid: Intelligent Energy Distribution, Microgrids, and V2G
The smart grid — the transformation of the traditional electrical grid through digital communication, sensing, automation, and distributed intelligence — is essential for integrating high penetrations of variable renewab
S_1_03 — Brain-Computer Interfaces and Consciousness Upload
Brain-computer interfaces (BCIs) translate neural activity into digital signals, enabling direct communication between the brain and external devices. The field spans from mature medical devices (cochlear implants: 1 mil
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