n Steven Spielberg's 1977 film "Close Encounters of the Third Kind," extraterrestrials communicate with humans through a catchy five-note sequence. In Spielberg's 1982 blockbuster "E.T.," a diminutive alien learns basic English from a children's TV show. More recently, in 2016's "Arrival," squid-like visitors use pictograms to make themselves understood to American scientists wielding whiteboards with words.

But what would really happen if we made direct contact with an ? How would we recognize or interpret their intelligence, and what would we say? Those were just some of the questions discussed during a wide-ranging conversation Monday afternoon sponsored by Harvard's Mind Brain Behavior Interfaculty Initiative and moderated by Edward J. Hall, Norman E. Vuilleumier Professor of Philosophy.

Using "Arrival" as a springboard, panelists Jesse Snedeker, a professor of psychology and expert in , and Avi Loeb, an astrophysicist and author of "Extraterrestrial: The First Signs of Intelligent Life Beyond Earth" (2021), examined the potential challenges we might face.\

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