An ancient alien civilization may have seeded the Earth with sensors providing a readout on what it’s like within our solar system’s habitable zone, Harvard University astronomer Avi Loeb suggests, and new unexplained aerial phenomena (UAP) sightings might be a sign of extraterrestrials following up.

Specifically, he says the interstellar object ‘Oumuamua might have been a spacecraft sent to tune into their signals, Loeb wrote in a new Scientific American op-ed. It’s an unusual explanation linking two separate topics — ‘Oumuamua’s trajectory and recent UAP sightings — but at the very least it’s interesting to consider all the possibilities of advanced life beyond Earth. And even if you find the idea a little too out there, Loeb suggested more researchers ought to start recording the sky so they can get to the bottom of things themselves.

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