Impact
Theories & discussion on mass extinctions, asteroid/comet impact and nova/supernova effects, global cooling/warming theories, origin of the universe, pattern mathematics and historical photography.
Big Bang theory, asteroid, black hole, black plague, cancer cluster, CCN, Chicxulub, CME, cloud, cosmic rays, Dark Ages, Deccan traps, deep impactor, dementia, dinosaurs, disaster preparedness, DDT, DMS, DNA, extinction, famine, fern spike, flood, Galacti
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