A Southwest Research Institute-led team updated planetary bombardment models with the latest geologic information and then applied those models to understand how impacts may have affected oxygen levels in the Earth’s atmosphere in the Archean eon, 2.5 to 4 billion years ago. This artistic conception illustrates large asteroids penetrating Earth’s oxygen-poor atmosphere. Credit: SwRI/Dan Durda, Simone Marchi
Study finds collisions that stalled oxygen growth on planet more common than thought.
Between 2.5 and 4 billion years ago, a time known as the Archean eon, Earth’s weather could often be described as cloudy with a chance of asteroid.
Back then, it …
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