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"How many years can a mountain exist before it is washed to the sea?"

Listing books by Ray Kurzweil (2)

Author info

Author name:: Ray Kurzweil

As author (1)

The Age of Spiritual Machines

by Ray Kurzweil

No image for _The Age of Spiritual Machines_

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As contributor (1)

What We Believe But Cannot Prove

by John Brockman and 109 more

Front of _What We Believe But Cannot Prove_

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