I will present the latest understanding of the structure and molecular dynamics of water and ice from the viewpoint of condensed matter physics and based on the state-of-the-art experimental spectroscopic data available. I will discuss the role of short sub-picosecond dynamics in the dielectric response of water and ice from direct current to terahertz. I will demonstrate a recently developed ionic model of water  that accounts for its spatial-time heterogeneity and sheds light on its anomalous properties in bulk and at the nanoscale. Finally, I will highlight the possible applications of the fundamental knowledge on water dynamics in energy systems, nanofiltration, and biological sciences.
 V. G. Artemov, Electrodynamics of Water and Ice, Springer Series in Chemical Physics, 124 (2021)