WISE Revises Numbers of Asteroids Near Earth

Data from NASA's Wide-field Infrared Survey Explorer has led to revisions in the estimated population of near-Earth asteroids. The most accurate survey to date has allowed new estimates of the total numbers of objects in different size categories.

PDF) Perilous Planet Earth Revisited. Updated version (September

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PDF) Perilous Planet Earth Revisited, Chronology and Catastrophism

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