http://www.newsweek.com/ice-vii-scientists-discover-how-extraordinary-ice-found-deep-below-earth-1198346

Researchers have unraveled a long-standing mystery relating to a bizarre form of ice which grows at over 1,000 miles per hour and is thought to exist deep within hypothetical “ocean world” planets far beyond the Solar System.

In a paper published in the journal Physical Review Letters, a team from the Lawrence Livermore National Laboratory (LLNL) have revealed the secrets of how this strange phase of ice, known as “ice VII” or “ice seven” freezes and crystallizes, Physics Central reported.