Sheri Wells-Jensen is fascinated by languages no one has ever heard — those that might be spoken by aliens. Last week, the linguist co-hosted a day-long workshop on this field of research, which sits at the boundary of astrobiology and linguistics.

The meeting, at a conference of the US National Space Society in Los Angeles, California, was organized by Messaging Extraterrestrial Intelligence (METI). METI, which is funded by private donors, organizes the transmission of messages to other star systems. The effort is complementary to SETI (Search for Extraterrestrial Intelligence), which aims to detect messages from alien civilizations.

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