Laser experiment hints at weird in-between ice
The odd state of matter may be found within icy planets like Neptune and Uranus
![illustration of superionic ice](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/02/020218_EC_superionic-ice_feat.jpg?fit=860%2C460&ssl=1)
ICING OUT An unusual form of ice is made of a solid lattice of oxygen ions (circles in this illustration) through which hydrogen ions travel freely (pink trails), like a liquid. Signs of the strange substance, known as superionic ice, showed up in a laser experiment.
S. Hamel, M. Millot and J.Wickboldt/NIF-LLNL