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.
81 results for "epigenetic clock" — page 2 of 5
Z_5_13 — Molecular Clocks: Timing Evolution at the Sequence Level
Molecular clocks — the observation that DNA and protein sequences accumulate substitutions (mutations that become fixed in a lineage) at approximately regular rates over long periods of evolutionary time, enabling the es
Z_3_02 — Epigenetic Inheritance & Transgenerational Effects
Epigenetic inheritance refers to the transmission of phenotypic information across generations through mechanisms other than changes in DNA sequence. The three primary molecular mechanisms — DNA methylation, histone modi
J_5_12 — Water Clocks: Clepsydrae and Ancient Timekeeping
The water clock — known by the Greek term clepsydra ("water thief") — was one of the most important timekeeping technologies of the ancient world, supplementing sundials by providing time measurement during the night, on
ZB_2_04 — Circadian Rhythms, Biological Clocks, and the Ancient Time-Keeping Body
Every cell in the human body keeps time. The circadian system — a ~24-hour internal clock governed by the suprachiasmatic nucleus (SCN) in the hypothalamus — orchestrates sleep-wake cycles, hormone secretion, body temper
ZB_5_07 — Chronobiology: Biological Clocks and Temporal Ecology
Chronobiology — the study of biological rhythms and their underlying molecular, physiological, and ecological mechanisms — reveals that nearly all living organisms, from cyanobacteria to humans, possess endogenous biolog
ZC_5_21 — Intergenerational Trauma: Epigenetic Inheritance and Collective Wounds
Intergenerational trauma (also transgenerational or historical trauma) refers to the transmission of traumatic effects from one generation to subsequent generations through psychological, behavioral, social, and — contro
G_3_27 — Morphic Resonance vs Epigenetic Inheritance: A Rigorous Comparison
For decades, Rupert Sheldrake's morphic resonance hypothesis — that organisms inherit form and behavior through a non-material "morphic field" carrying patterns from past similar systems — has been the most prominent fri
L_4_06 — Epigenetics and Transgenerational Inheritance
Epigenetics — the study of heritable changes in gene expression that occur without alterations to the DNA sequence itself — has transformed modern biology by revealing a layer of regulatory information "above" the genome
L_4_03 — Genetic Clocks and Molecular Dating
The molecular clock — the concept that DNA and protein sequences accumulate mutations at approximately regular rates over time — provides a powerful tool for dating evolutionary divergences independently of the fossil re
ZA_5_08 — Atomic Clocks: The Most Precise Instruments Ever Built
Atomic clocks — timekeeping devices that use the invariant frequencies of atomic transitions as their oscillation reference — are the most precise measuring instruments ever constructed, achieving fractional frequency un
Z_5_07 — Epigenome Mapping: Charting the Chemical Modifications of DNA and Chromatin
Epigenome mapping — the systematic, genome-wide identification and quantification of epigenetic modifications (chemical marks on DNA and histone proteins that regulate gene expression without changing the underlying DNA
Z_1_19 — Non-Coding RNA and Gene Regulation
Non-coding RNAs (ncRNAs) — RNA molecules that are transcribed from the genome but do not encode proteins — have emerged as central regulators of gene expression, challenging the classical "one gene–one protein" paradigm
Z_1_15 — Long Non-Coding RNA: The Dark Matter of the Transcriptome
Long non-coding RNAs (lncRNAs) — RNA transcripts longer than 200 nucleotides that do not encode proteins — represent one of the most surprising and rapidly expanding frontiers of molecular biology. The human genome encod
Z_4_23 — Memory as Physical and Molecular Phenomenon
What is a memory made of? The question has driven neuroscience from Santiago Ramón y Cajal's 1894 hypothesis that learning strengthens connections between neurons, through Donald Hebb's 1949 postulate that "neurons that
T_2_21 — Collective Trauma Psychology
Collective trauma refers to the psychological impact of traumatic events experienced by entire communities, populations, or cultural groups — events such as genocide, slavery, colonialism, war, natural disasters, and pan
L_3_16 — Genomic Imprinting & Evolutionary Conflict
Genomic imprinting — the epigenetic phenomenon in which a subset of genes (~100–200 in mammals) are expressed from only one parental allele, with the other allele silenced by DNA methylation and histone modification esta
S_1_21 — Quantum Sensors and Metrology
Quantum sensors exploit the extreme sensitivity of quantum systems — atoms, ions, photons, superconducting circuits, and spin defects — to measure physical quantities (time, frequency, magnetic and electric fields, gravi
F_1_23 — Genetic Adam & Mitochondrial Eve
"Mitochondrial Eve" and "Y-chromosomal Adam" are the names given to the most recent common ancestors (MRCAs) of all living humans through the exclusively maternal (mitochondrial DNA) and exclusively paternal (Y-chromosom
X_2_06 — Sleep Medicine and Chronobiology
Sleep medicine — the diagnosis and treatment of sleep disorders — and chronobiology — the study of biological rhythms — are relatively young scientific fields that address a phenomenon that occupies roughly one-third of
X_3_26 — Chronobiology & Circadian Medicine
Chronobiology — the study of biological rhythms — has emerged from a niche curiosity to a Nobel Prize–winning discipline with profound implications for medicine, metabolism, and mental health. [KEY FINDING] The 2017 Nobe
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