Pluto may be hiding a major secret deep in our solar system. Scientists believe that its “heart” has a vast ocean of liquid water underneath, and it is possible that this ocean could host some alien life.

The findings are based on studies from November that were published in the journal Nature. These studies used data from NASA’s New Horizons spacecraft, which flew by the dwarf planet in July 2015. But the big question is whether this ocean could actually support life.

Scientists think that while the waters of the ocean are below freezing, a lot of chemicals in it probably make it a slushy consistency. It certainly wouldn’t ideal conditions for life, but as life as shown here in some hostile places on Earth, it can be found in some amazing places.

“In fact, New Horizons has detected ammonia as a compound on Pluto’s big moon, Charon, and on one of Pluto’s small moons. So it’s almost certainly inside Pluto,” William McKinnon, professor of earth and planetary sciences in Arts & Sciences at Washington University in St. Louis, said in a statement. “What I think is down there in the ocean is rather noxious, very cold, salty and very ammonia-rich — almost a syrup.

“It’s no place for germs, much less fish or squid, or any life as we know it,” he added. “But as with the methane seas on Titan — Saturn’s main moon — it raises the question of whether some truly novel life forms could exist in these exotic, cold liquids.”