Extra Extra: Pluto Has a Heart - And its Liquid

Mankind really had no idea what Pluto looked like until 2015, when the New Horizons spacecraft hurtled by the planet and took the first "close up" pictures of the distant dwarf-planet. The flyby gave us more than a few HD pictures however. Though the surface of Pluto is frigid, due to a balmy average temperature of -380 degrees Fahrenheit, there are a number of surprises to be found, above and below the surface.

1
How Can There Be Liquid on a Frozen Planet?

Some of the images and data taken by New Horizons showed that the "heart" on Pluto's surface, on its left side, seemed to have a liquid ocean beneath the surface. How could this be though, if Pluto is a frozen planet without any volcanic activity?

Via Scientists Might Have an Explanation for Pluto’s Subsurface Ocean | ExtremeTech
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2
The Answer: Gas.

Scientists, after their analysis of new data from the mission, believe that the ocean under Pluto's surface is insulated by pockets of gas, like methane. These pockets slow the transfer of heat from the core of the planet outwards. This would also explain at the same time the lack of methane in Pluto's atmosphere.

Via Pluto's 'heart' may be cold as ice, but it's in the right place, according to research | Phys.org
3
The "Lake" Is Alive

Pluto's "heart" is still geologically active, and what's more, it also is actively smoothing out the craters that pockmark the planet's surface. Scientists compared the process to how glaciers form and move, and noticed on the way a number of significant "tectonic features", indicating that Pluto is constantly undergoing geological change still.

Via Earth-like dunes of icy methane found on Pluto | Axios
4
The Circle Of (Water) Life

Another fascinating nearby feature are the amoeba-like icy, convective cells. Similar to a lava lamp, the minimal geothermal activity at Pluto's core heats solid nitrogen, which becomes buoyant eventually and rises to the surface, like a blob. It then cools down as it gets closer to the surface, and eventually falls back down to repeat the process again.
With some "cells" like these approximated to reach miles deep, the question is, will NASA have a Pluto Submarine for it's next mission.

Via Churn, churn, churn: Pluto’s ‘heart’ renews itself | The Source
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5
Not Dead Yet

Scientists up until the New Horizons mission assumed that objects in the Kuiper Belt, like Pluto and Charon, were more or less dead worlds, finished with their long long trip. But with the results of the mission, objects like Haumea, Eris, and Makemake could be as complex geologically as planets like Mars or Earth. We'll just have to wait for New Horizon's next update.

Via A Planet-Sized Debate: NASA Chief Says He Still Classifies Pluto as a Planet | EMN
6
How Pluto Looks According To Scientists (And a Computer)

Via New Horizon's Flyover of Pluto | NASA