Inside the dynamic diamond anvil cell used by the KRISS research team to generate the supercompressed state. (A pair of diamond anvils can be seen.) Credit: Korea Research Institute of Standards and Science (KRISS) The Korea Research Institute of Standards and Science (KRISS, President Lee Ho Seong) has captured the first-ever observation of water repeatedly freezing and melting at ultrahigh pressures above 2 gigapascals (2 GPa) while remaining at room temperature. These rapid changes were