Where are They, All Those Aliens? | Closer to Truth
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Episode Synopsis

Most scientists assume that the universe must be populated with innumerable alien intelligences and civilizations - after all, we humans can't be so special. OK, so where are they, these "innumerable alien intelligences and civilizations"? How come there's zero evidence?

Episode Segments

1. Jill Tarter
2. Douglas Vakoch
3. Frank Drake
4. Raymond Kurzweil
5. Francisco J. Ayala
6. Steven J. Dick
7. David Brin

Where are They, All Those Aliens?