The scientist who searches for extraterrestrials

According to astronomer Seth Shostak, the alien intelligences we'll likely encounter someday won't be "little grey guys with big eyeballs but machines." As senior astronomer at the SETI Institute, Seth has dedicated his scientific career to seeking out evidence of ET transmissions and using that research to educate the public about our place in the universe. Mark Frauenfelder and I interviewed Seth about hunting for aliens in this episode of For Future Reference, a new podcast from Institute for the Future:

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