Big History - a journey through time, space, evolution, and historyhttp://malankazlev.com/bighistory/
time. Molecular era. Interstellar nebula, dust clouds, primitive minerals, interstellar molecules, cosmic dust formed from exploding nova and supernovae. Planetary or chemical era
An overview of the history of the universe, from the Big Bang to the present day and beyond, showing the relation between the cosmos, life, and history, and deep time, historical t
Observable Characteristics of Extraterrestrial Technological Civilizationshttp://www.rfreitas.com/Astro/ObservableETC1985.htm
band, is ideal for interstellar communication and future SETI searches. Other possible observables of advanced civilisations include redshifted neutrino point sources, an artifici
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