Water is the second most common molecule in the universe. The most common is hydrogen gas, H2.
The biggest known cloud of water vapour was discovered by Nasa scientists around a black hole 12 billion light years from Earth. There is 140 trillion times as much water in it as all the water in the world’s oceans.
The Antarctic has been covered in ice for more than 30m years. Right now, it is covered by 10 thousand trillion tons of snow and ice.
