New Debate over How to Contact Alien Life

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Space probes Pioneer 10 and Pioneer 11 carry a plaque with symbols. Credit: NASA

Space probes Pioneer 10 and Pioneer 11 carry a plaque with symbols meant to make alien contact possible. NASA hide caption

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Researchers writing in Nature this week argue that radio signals are not the most efficient way of alerting an extraterrestrial intelligence to our existence — and that anyone out there who is trying to send out a similar message is likely to have reached the same conclusion.

The scientists recommend sending, and searching for, an interstellar message in a bottle. NPR's David Kestenbaum reports.



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