So far, only one planet has been found in a globular cluster, but Di Stefano discounts critics who say clusters' old, metal-poor stars are poor hosts for planets.
Exoplanets have been found stars with only one-tenth of the heavy elements that are found in the sun, Di Stefano said.
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"It's premature to say there are no planets in globular clusters," Alak Ray, with the Tata Institute of Fundamental Research in Mumbai, said in a press release.
If habitable planets can form in globular clusters and survive for billions of years, life would have ample time to become increasingly complex, and even potentially develop intelligence, the scientists said.
"It would be very serene to live in a globular cluster, but it would also be bright because there would be so many nearby stars," Di Stefano told reporters during a press conference on Wednesday.
Global cluster civilizations also may be able to communicate with one another far easier than what Earthlings can manage, as the nearest star to our solar system is four light years away, roughly 24 trillion miles.