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62 results for "period" — page 3 of 4
Q_2_16 — White Dwarfs, Type Ia Supernovae, and Standard Candles
White dwarfs — the remnant cores of low- and intermediate-mass stars (initial mass < ~8 M☉, ~97% of all stars) — are dense objects supported against gravitational collapse by electron degeneracy pressure, with typical ma
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
ZB_5_01 — Biological Rhythms Beyond Circadian
While circadian (~24-hour) rhythms are the best-studied biological oscillations (2017 Nobel Prize to Hall, Rosbash, Young), life is permeated by rhythms operating across all timescales — from millisecond neural oscillati
O_4_05 — Desertification, Green Sahara & Landscape Transformation
Between approximately 11,000 and 5,000 years BP, the Sahara — today the world's largest hot desert — was a green, well-watered landscape of lakes, rivers, and grasslands supporting hippopotami, crocodiles, fish, and larg
O_5_17 — Deep Time: Geological Chronology and the Scale of Earth History
Deep time is the concept that Earth's geological history extends across approximately 4.54 billion years — a scale so vast that human civilization occupies less than 0.00001% of it. First articulated by James Hutton in 1
T_1_04 — Developmental Psychology — From Piaget to Attachment Theory
Developmental psychology traces psychological changes across the human lifespan, from prenatal development through aging. Jean Piaget's cognitive stage theory, Lev Vygotsky's sociocultural approach, John Bowlby's attachm
T_3_08 — Psychology of Language and Bilingualism
Psycholinguistics — the study of psychological processes underlying language production, comprehension, and acquisition — spans one of the deepest questions in cognitive science: how do humans acquire, process, and use l
D_1_19 — Poverty Point: Louisiana's Enigmatic Archaic Earthwork Complex
Poverty Point is a Late Archaic period (approximately 1700–1100 BCE) earthwork complex located near the town of Epps in West Carroll Parish, northeastern Louisiana, on the Macon Ridge overlooking the floodplain of Bayou
B_4_12 — Tengu, Oni, and Japanese Supernatural Taxonomy
Japanese tradition preserves one of the world's most elaborate and systematized supernatural taxonomies — a vast ecosystem of non-human beings encompassing kami (gods/spirits), yōkai (strange beings), yūrei (ghosts), oni
Y_4_05 — Dreams, Dream Incubation, and Oneiric Knowledge
Dreams have been treated as a source of knowledge, prophecy, and divine communication in virtually every civilization. Ancient Mesopotamians maintained professional dream interpreters (šāʾilu) and compiled dream omen com
S_3_01 — Climate Change, Civilization, and Deep-Time Context
Earth's climate has always changed — but the current rate and mechanism are unprecedented in geological history. This document places the modern climate crisis within the deep-time context that the corpus demands: from t
F_2_17 — Trans-Saharan Rock Art Corridors: Mobility Evidence in Stone
The Sahara Desert — today the world's largest hot desert (~9.2 million km²) and one of Earth's most formidable barriers to human movement — was, during recurring humid periods (the "Green Sahara" or "African Humid Period
F_4_09 — The Green Sahara — When the Desert Was Eden
For most of the last several thousand years, the Sahara has been the world's largest hot desert — 9.2 million km² of arid wasteland. Yet between approximately 11,000 and 5,000 years ago, during the period known as the Af
F_4_01 — Atlantis
Atlantis is the most famous lost-civilization tradition in the Western world — a powerful island empire described by Plato in two dialogues (~360 BCE) that was destroyed by the gods and "swallowed up by the sea" in a sin
ZA_5_07 — Atomic Structure: Electrons, Orbitals, and the Quantum Atom
Atomic structure — the arrangement of electrons around the nucleus of an atom, governed by the laws of quantum mechanics — provides the foundation for all of chemistry, spectroscopy, and much of condensed matter physics.
ZA_4_11 — Time Crystals and Discrete Time Symmetry Breaking
A time crystal is a phase of matter that spontaneously breaks time-translation symmetry — the fundamental physical principle that the laws of physics are the same at all times (which, via Noether's theorem, is linked to
I_3_10 — Japan and East Asian UAP Historical Accounts
East Asia — particularly Japan — possesses one of the richest yet least-studied traditions of anomalous aerial and maritime observations in the world, spanning from mythological accounts in ancient texts through detailed
V_3_13 — Nonlinear Dynamics and Bifurcation Theory
Nonlinear dynamics studies systems whose behavior is not proportional to their inputs — where small changes can produce large effects, qualitative transitions, and deterministic chaos. While linear systems superpose pred
A_1_25 — Kassite Period Babylonian Texts
The Kassite dynasty (c. 1595–1155 BCE) ruled Babylon for over 400 years, making it the longest-ruling dynasty in Babylonian history — yet it remains one of the least understood periods of Mesopotamian civilization. The K
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