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The Wisdom of Carl Sagan
The Wisdom of Carl Sagan
The Wisdom of Carl Sagan
The Wisdom of Carl Sagan
The Wisdom of Carl Sagan
The Wisdom of Carl Sagan

The Wisdom of Carl Sagan

LibertyPen - 2018-01-02

Short excerpts of sterling insights from the brilliant and beloved American astronomer, cosmologist, astrophysicist, astrobiologist and author Carl Sagan. LibertyPen.com