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

itoggle caption NASA

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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