Here's some facts about the water from your tap at home - that you might usually not give a second thought to.
Some of the water you're drinking might have been around at the same time as the dinosaurs.
Since planet Earth is a closed system, all water is recycled. Therefore, the water the dinosaurs sipped in prehistoric times is the same water we drink today. All the more reason to keep our waters clean!
A five-minute shower uses 200 litres of water. You use 8 litres to flush a toilet – about the same as you use to brush your teeth. If you leave the tap on, that is.
We each drink around 1 cubic metre (1000 litres) of water a year.
Most tap water contains some form of fluoride. It's said to be good for dental health. But excessive amounts can have harmful side effects, like bone tenderness and fractures.
Water is sticky. The molecules love to stick to things, especially each other. It's what gives it such a large surface tension. It keeps you alive: it means water can pull blood up narrow vessels in the body, often against the force of gravity.
In 2008, it was found that there were small traces of pharmaceuticals found in the water of some major US cities, including antibiotics, anti-convulsants and sex hormones.
There are about 1.5 billion cubic kilometres of water on Earth – that's 1.5 billion trillion litres, or 800 trillion Olympic swimming pools.