Is there life beyond Earth? The question has turned out to be one of the hardest to answer in science. Despite the seemingly boundless expanse of the universe, which implies there's potential for abundant life, the vast distances between stars render the search akin to locating a needle in a cosmic haystack.
The Search for Extraterrestrial Intelligence (SETI) constitutes a branch of astronomy dedicated to finding extraterrestrial life by searching for unusual signals, dubbed technosignatures. The identification of a technosignature wouldn't just signify the existence of life, but specifically point to the presence of intelligent life using advanced technology.
That said, 60 years of searches have so far come up short. But now my colleagues and I have started investigating a previously unexplored range of frequencies.
SETI makes the assumption that extraterrestrial civilizations might rely on technology in a similar way to people on Earth, such as using cell phones, satellites or radar.
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