This is pretty cool. It turns out you can freeze water at room temperature, creating so-called "hot ice." There are at least two known methods for doing this. Hot ice effectively transforms water into a solid that is like a form of glue. This opens the door for some interesting potential applications -- including using water to seal food packaging (instead of chemical glues), using water to seal leaks in ships, tunnels and pipes (imagine self-healing hulls and pipes that use water to seal leaks), and perhaps even using water to destroy cancer cells -- the potential applications are endless.