Bill Watterson Quotes: Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has ...

Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us. (Bill Watterson)

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Bill Watterson Quotes: Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.

Bill Watterson Quotes: Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.

Bill Watterson Quotes: Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.

Bill Watterson Quotes: Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.

Bill Watterson Quotes: Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.

Bill Watterson Quotes: Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.

Bill Watterson Quotes: Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.

Bill Watterson Quotes: Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.

Bill Watterson Quotes: Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.

Bill Watterson Quotes: Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.

Bill Watterson Quotes: Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.

Bill Watterson Quotes: Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.

Bill Watterson Quotes: Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.

Bill Watterson Quotes: Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.

Bill Watterson Quotes: Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.