Similar cracks, fissures, rifts, cliffs, escarpments, geological features on Mercury, due to pre existing theories, have scientists suggesting that planet Mercury is shrinking. Mercury is a tiny planet and was considered geological dead before recent findings.
Planet Earth, one of the most geological active, energetic, electromagnetically active planets in our solar system is absolutely stable. If you suggest the idea that similar geological features on our planet means it has or is expanding or then you are a crackpot dealing in pseudoscience. Fact - the geology is settled.
Expanding planet Pluto?
Pluto, once a planet but now small enough to be degraded to a dwarf planet status, is so far away from the heat of our sun (49 times further the distance from the Sun to Earth) how is it still geological active?
The infamous Phil Plait of the Bad Astronomy blog, the man who attacks anything that is not in agreement with established scientific theory but this time has no choice but to mention it has had to admit this about the possibility of an expanding planet Pluto and the most unlikely of all the planets in our solar system to expand.
Scattered around the surface are another type of feature: huge cracks, some hundreds of kilometers long and many kilometers deep. They’re pretty interesting, and their presence has led one group of planetary scientists to make an astonishing claim: There may be a liquid water ocean under the surface of Pluto!
If this is true, it’s a very big deal. Pluto is small and extremely cold, so the last thing you’d expect is liquid water anywhere within 3 billion kilometers of it. How can this be?
First, the evidence. The cracks are called extensional tectonic features, meaning you get them when the surface extends, expands. Imagine covering a balloon with mud. Let the mud dry, then inflate the balloon a little bit. What happens? As the balloon expands, it pushes the mud from underneath. Mud isn’t stretchy like rubber, so instead of smoothly expanding it cracks, allowing the pressure underneath to be relieved.
Does Pluto Harbor an Ocean Under All That Ice? | Phil Plait
What would Phil Plait have said of Galileo Galilei's pseudoscience ideas about planet Earth not being the centre of the solar system or the universe when it obviously is?
Science did not predict a single thing correct about Pluto's geology or about the planet in general. Or any planet or asteroid or comet we have actually visited or observed.
The New Horizons spacecraft has found evidence for geologic activity on the surface of Pluto, including extensional tectonic deformation of its water ice bedrock. One mechanism that could drive extensional tectonic activity is global surface expansion due to the partial freezing of an ocean.
Recent Tectonic Activity on Pluto Driven by Phase Changes in the Ice Shell (direct link to PDF)
Scientists now suggest that comets are dirty snowballs but have had to change that to icy dirtballs when all the visual evidence suggests they are rocky. Are comets asteroids with a potential difference to the Suns plasma wind?
Are planets so far from the heat of the Sun like Pluto electromagnetically active? This could be one possible explanation of why and how they are or were recently still geologically active.
The study found if Pluto's ocean had frozen into oblivion millions or billions of years ago, it would have caused the entire planet to shrink. But there are no signs of Pluto contracting. In fact, New Horizons showed signs Pluto has been expanding.
'What New Horizons showed was that there are extensional tectonic features, which indicate that Pluto underwent a period of global expansion,' Mr Hammond said.
Pluto could still have liquid water lurking under its icy surface | Daily Mail
Not expanding Pluto
Another option is that Pluto is not expanding or contracting. It just has normal common universal features, that nearly all other comets, asteroids, moons and planets have.
But that requires a completely new geology theory or model where gravity, water erosion and long term uniformitarianism is not responsible or the main factors.
But modern geology theory has completely failed to predict or sensibly explain what we have found on other space bodies, so any reasonable alternative geology theories have to be considered. As they could not be any worse and can not get a less successful prediction rate.