While politicians quibble over how to deal with illegal immigration, an ominous group of foreigners goes unaddressed: space aliens.
Should humans try to contact creatures from other galaxies? Do we really want that force awakened? For scientists, this isn’t some esoteric question. The fate of the planet may be at stake.
In recent years, a fierce debate has erupted over proposals to beam messages toward distant solar systems. Until now, the search for extraterrestrial intelligence – or SETI – has largely been limited to listening for radio signals from other galaxies. Having failed to detect a single peep, some scientists want to turn the tables and begin broadcasting missives from Earth into deep space.
But that creates two dilemmas.
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