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"It suggests that melting, despite its complexities, exhibits a fundamental unity across diverse systems, from noble gases to metals."

That glass, once cooled, then is filled with neon, the inert noble gas that gave the 1950s and the 1990s their distinctive looks.

They also found that the ratio isotopes for a different noble gas, neon, matches the conditions believed to have existed on Earth when the planet was formed millions of years ago.

The noble gas neon was first isolated by British chemists at the turn of the 20th century.

Ukraine was one of the world's largest suppliers of noble gases until it suspended production at its plants in the cities of Mariupol and Odesa in March.