"The crust is towards the thinner less dense end of the pre-mission expectations" -Mark Panning

So here's a major thing. A truly big deal. Mars is the feature of actual government conspiracy. Basically, people expect things of Mars, planetary science is not even remotely corroborating those expectations, and NASA literally will look straight into the camera and say "fossil" twenty times and "Hesperian" not even once during the Perseverance press release. Presumably they do this to keep the hype up, meaning they think plebeians would lose interest in Mars if they knew the truth. 

To find real facts about Mars, you really need these LPI videos. They are not at all vague. The "warm-wet Hesperian" they sometimes speculate about is still a huge frozen asteroid, no rain, no surface liquid. But people like Elon Musk and Robert Zubrin seem to have committed to a faith, and the church has many followers. 

In this video alone you can get a glimpse of real Mars. This video is about seismology, not specifically Mars or InSight, but the details are there.  

• Thick Lithosphere
• Mantle on the cool end of pre-mission expectations
• The core is light, not dense. Sulfur in the core
• Cerebus Fossae Graben
• Normal fault, extensional settings

The truth is Mars isn't made out of Earth. It's made out of Mars and that is far less dense, and far colder than people find intuitive. However, because Mars is so different compared to Earth, the geology is also vastly different, and fascinating.  

Probably the most intriguing thing about real-Mars is how large-scale its features are. One vast feature is the Amazonian horst-graben rifting, especially Valles Marineris. Mars earthquakes are largely the result of thermal contraction as the core freezes. Its heavy features, the Hesperian shield volcanoes and Noachian south, seem to remain anchored, while the northern lowlands seem to be experiencing large scale extensional rifting. That's incredible for a lot of reasons, but one thing to note is that if the core shrinking was the only thing driving Mars topography, there would be a lot more thrust-faults, not rifting, like on Mercury. The low density (hence poor ore) of Mars' thick lithosphere seems to be playing a mysterious role. 

Maybe one of the bravest things I did in Sweet was to touch on Mars being unsuitable to long term habitation, something poorly informed writers and fanatics eschew. At the point where people could truly exploit Mars, they could also dismantle it, and that is far far into deep time.