Mars looks a lot more Earth like than we thought bigger and more liquid core, thinner crust but there are differences as we might expect from a smaller planet as mentioned and described in this article.i repeat a few lines from article. "The large core implies a martian mantle mineralogically similar to the terrestrial upper mantle and transition zone but differing from Earth by not having a bridgmanite dominated lower mantle. We inferred a mean core density of 5.7 to 6.3 grams per cubic centimeter, which requires a substantial complement of light elements dissolved in the iron-nickel core.” Too bad the heat flow probe mandated a landing in plane and soft [well] Elysium Planitia since the large core unexpectedly limited the seismic viewing. Closer to Thasis may have been more illuminating. But as it is, exciting results!