SCIENCE - Researchers claim to have discovered why warm water freezes faster than cooler water

(Phys.org) —A team of researchers at Singapore's Nanyang Technological University believes they have solved the mystery of why warm water freezes faster than cooler water. It has to do with the way energy is stored in the hydrogen bonds between water molecules they suggest in their paper which they've uploaded to the preprint server arXiv ...

http://phys.org/news/2013-11-faster-cooler.htm