Why does Mars have a small core and a thick crust?

Mars has a small core primarily due to its lower mass and gravity compared to Earth, which resulted in less pressure to form a larger metallic core. Additionally, its volcanic activity has waned over time, leading to a thicker crust that has not been significantly reshaped by tectonic processes. The combination of these factors contributes to Mars' unique geological structure, characterized by a relatively small core and an extensive, stable crust.