Sunken worlds and 'kidney beans' on Mars
This proposes that the Moon formed during a collision between the Earth and another small planet, about the size of the planet Mars. The debris from this impact collected in an orbit around Earth to ...
Sometimes Mars feels like the setting for a Dr. Seuss ... “Concretions are solid masses within a rock that form as water flows through sediment, dissolving minerals and reprecipitating them ...
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