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, Galactic Cosmic Rays, galaxy, GCR, Geiger counter, geomagnetic, Global Cooling, Global Warming, gluon, grain mill, heliography, heliosphere, Holocene, hydrocarbon, ice age, impact, infrastructure, interglacial, Lakagigar, Little Ice Age, long period comet, LPC, leukemia, magma, magnetic field, mass fires, Maunder Minimum, meteor, mutagen, nanoTesla, nuclear explosion, nuclear winter, neutrino, Oort cloud, pandemic, pattern mathematics, Permian, petroleum origin, Pleiades, Pleistocene, photographic inventions, phytoplankton, Popcorn theory, preparedness, QGP, quark, radiation, shielding, Siberian traps, solar wind, SSA, starvation, sunspots, supernova, tsunami, threat analysis, volcanic, Tunguska, survival