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Earth's churning mantle may have created the Great Unconformity
Explaining the Great Unconformity, where Cambrian deposits sit on top of older rocks.
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Explaining the Great Unconformity, where Cambrian deposits sit on top of older rocks.
NASA is exploring a daring plan to save the legendary Hubble Space Telescope from its eventual fiery plunge into Earth's atmosphere. After more than 35 years of…