Earlier this year, researchers from the United States, China, the United Kingdom, and the Netherlands released a proposal for the “Beacon in the Galaxy,” a message designed to solicit contact from alien worlds. Unlike previous earthbound suggestions, from digging a fiery trench in the Sahara to outfitting the Eiffel Tower with mirrors aimed at Mars, the BITG, if sent, would broadcast an encoded radio message to distant star systems. Work on the BITG began in late 2019, when Jonathan Jiang, an astrophysicist at NASA’s Jet Propulsion Laboratory, was studying how advanced civilizations in the Milky Way would be affected by war, industrialization, and biotechnology. He found that even if the probability of a nuclear apocalypse were just .01 percent, few civilizations would survive much longer than humans have already. Jiang…