Understanding the properties and history of the core of Earth-like planets is essential to constructing a global planetary structure and evolution model and has implications for the planet's thermal, compositional, and orbital evolution. Unraveling planetary cores' structures, dynamics, and history, however, requires a synergy between many fields of expertise, such as mineral physics, geochemistry, seismology, geodynamics, gravimetry, geomagnetism, or remote sensing. This session welcomes contributions from all the aforementioned disciplines following theoretical, numerical, observational, or experimental approaches and aims to serve as a catalyst for multidisciplinary studies of Earth and Earth-like planetary cores.