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The surface of the Earth is the shore of the cosmic ocean. From it we have learned most of what we know. Recently, we have waded a little out to sea, enough to dampen our toes or, at most, wet our ankles. The water seems inviting. The ocean calls. So.
- Carl Sagan -
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The universe is a pretty big place. If its just us seems like an awful waste of space.
- Carl Sagan