We document the terraforming of the Earth by the cratering and accretive action of impacting comets and resulting ejecta, during events occurring at regular intervals over the past 15,000 years. Visual evidence of geomorphed landscape is presented using the perspective of high-resolution satellite imaging and DEM data. Correlation of these images with physical and historic evidence has proven supportive.
Sections of the lithosphere may have been lofted thousands of kilometers. Excised trenches have filled with water, or left as barren desert. Perhaps blankets of ejecta have overlain the continents and their inhabitants. The atmosphere would have been disrupted by the influx of dust and energy. Composed of hydrated silica, the comets would add a significant percentage of the water and unusually pure silicate (as sand and clay) now present on earth.
Human history is immersed in these events. Oral and written works comprising much of the world’s cultural heritage provide us with accounts of catastrophic damage visited upon Earth and its inhabitants. Those accounts describe ominous objects moving across the skies, mountains being moved, large expanses of the earth being swept clean - or replaced with open ocean - civilizations buried, years of darkness, the world flooded.
Our forefathers invoked deities from the heavens, or perhaps giant kangaroos. We invoke impactors from the Taurid Complex, a simple and natural process, as most of its progenitor's mass may be missing. The damage to the earth is interpreted as the result of hundreds of grazing and nearly tangential impacts, suggesting decaying orbits of earth-captured cosmic bodies as a plausible solution. The events are seen occurring when the low point of the orbit -the perigee- reaches the earth's surface; in effect Perigee: Zero.
