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Earth’s water did not come from melted meteorites, according to a new study that analyzed melted meteorites that had been floating around in space since the solar system’s formation four and a half billion years ago. These meteorites had extremely low water content, regardless of their origin in the outer or inner solar system, ruling them out as the primary source of Earth’s water. The dashed white line in the attached illustration is the boundary with the outer solar system showing material transport from the outer solar system to the inner solar system.

Where did Earth’s water come from? Not melted meteorites, study reports

Scientists believe dust launched from the moon could reduce solar radiation enough to lessen the impact of climate change

Can space dust slow global warming?

Asteroid Itokawa

Nukes needed to save Earth from common killer asteroid

Boudinage in brecciated dolostone rocks of the Panamint Range (Wildrose Area, Death Valley National Park). New research shows that periclase is stronger than bridgmanite in earth's lower mantle, analogous to boudins developing in rigid ("stronger") rocks among less competent ("weaker") rocks.

What Are They Up To? Surprising Behavior of Minerals Deep in the Earth

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