Dan Shim is a mineral physicists interested in the evolution, structure, and dynamics of the interiors of Earth and planets. He studies the chemical reaction, element partitioning, volatile storage, phase transitions, and physical properties of materials at the pressure and temperature conditions of Earth and planetary interiors by combining a wide range of high pressure techniques (laser-heated diamond-anvil cell and multi anvil press) with variety of analytical techniques (synchrotron X-ray, laser spectroscopy, aberration corrected electron microscopy, infrared spectroscopy, and mass spectrometry). His recent research includes phase transitions in the deep interiors of Earth and exoplanets, electronic transitions of iron in mantle silicates, volatiles storage in deep planetary interiors, redox conditions of deep planetary interiors, and structural changes in amorphous silicates at high pressure.