It’s possible that an extremely advanced alien civilization has created a transportation network of wormholes around the universe — and we might even be able to spot them.

While it’s certainly a far fetched theory, according to a new piece by BBC Science Focus, it has some scientists intrigued. Take Nagoya University astrophysicist Fumio Abe, who told the publication that we may have even already captured evidence of such a network in existing observations — but lost them in the sea of data, leading to the intriguing prospect that reanalyzing old observations could lead to a breakthrough in SETI.

“If the wormholes have throat radii between 100 and ten million kilometers, are bound to our Galaxy, and are as common as ordinary stars, detection might be achieved by reanalyzing past data,” Abe told Science Focus.

It’s an alluring theory, in other words, that suggests one more pathway to figure out once and for all whether humans are alone in the universe.

They may have throat radii far smaller than that. To read more, click here.