The structure, dynamics, and history of iron-bearing planetary cores are critical to constrain the evolution of Earth and other planets. Seismological observations provide a picture of the core as it is today, with an increasing body of observations and data processing techniques offering new avenues to study the core on Earth, but also other bodies such as Mars. Additional information can be deduced from high pressure mineral physics which can help in understanding the underlying effects of composition, chemical, and crystalline structure on the core as it is today or during its evolution since the formation of the Earth. Finally, models of formation, dynamics, and heat transport and evolution can be built and combine observational constrains to help our understanding of the structure, dynamics, and history of planetary cores. In this session, we welcome contributions from all disciplines to provide a comprehensive overview of the current state of planetary cores from disciplines including seismology, mineral physics, geochemistry, magnetism, gravity, dynamics or other related fields.