Today, Pluto is a freezing cold world with a surface temperature of about 45 Kelvin, or -380 degrees Fahrenheit. However, the research suggests that early on during its ancient history, Pluto had higher chances of being habitable.

Can humans survive on Pluto?

It is irrelevant that Pluto's surface temperature is extremely low, because any internal ocean would be warm enough for life. This could not be life depending on sunlight for its energy, like most life on Earth, and it would have to survive on the probably very meagre chemical energy available within Pluto.

Will Pluto be the last habitable world?

But by the time the Sun reaches peak luminosity (during its RGB and then AGB stages) Pluto may warm up to an acceptably habitable 300 Kelvin (27 Celsius). ... Pluto would have at best a few hundred thousand, or possibly a million or two years to bask in the glory of being the last habitable world of the solar system.