That's not where water's mysteries end, either. For some reason, hot water freezes faster than cold water. That is to say, if you take a glass of hot water and a glass of cold water and put them both in the freezer at the same time, the hot water will turn to ice before the cold water does. It's called the Mpemba effect, because it was discovered by a Tanzanian high school student named Erasto Mpemba in 1969. Actually, it was first discovered by Aristotle, but that guy was getting all the glory anyway, and Mpemba really needed a win.
Plus, Aristotle was notorious for making shit up.
Again, the reason for this is completely unknown. We're just going to have to assume that water is some kind of sorcery and hope that the warlocks in charge of it are not angered by the fact that we poop in their magic every day.