Water is so much a part of our very existence that we sometimes don't imagine that there are interesting facts attached to this colourless liquid. Here are a few.
This is called the Mpemba Effect and sounds counterintuitive. But this is true.
Confused? Well water containing hydrogen isotope (deuterium) is called 'heavy water'. It's used in nuclear reactors. It is literally heavier than normal water.
This happens when it becomes 'superionic ice' on planets Uranus and Neptune. The water behaves like a solid as well as liquid state, all at the same time!
Sea water is salty. But when it freezes, it undergoes freezing-point depression. Hence salts remain in water and sea ice is free of them.
Water can exist as solid liquid and gas at the same when it is at 0.01 degree Celsius and under 0.00604 G pressure.