“I'll join you when hell freezes over, ” said Neville. “Dumbledore's Army! ” he shouted, and there was an answering cheer from the crowd, whom Voldemort's Silencing Charms seemed unable to hold.
And despite being on the edge of the Arctic Circle, the coastal waters around Iceland don't freeze over and these seas attracts some of the planet's biggest animals.
The researchers believe that parts of the ocean would gradually freeze over time. Water expands as it freezes, and cracks on Pluto's surface may be evidence of this.