The bombardment of Earth nearly 4 billion years ago by asteroids as large as Kansas would not have had the firepower to extinguish potential early life on the planet and may even have given it a boost, says a new University of Colorado at Boulder study. ...> Full Article
Was the course of life on the planet altered 12,900 years ago by a giant comet exploding over Canada? New evidence suggests the answer is affirmative. ...> Full Article
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