A scientist on the television tonight said that the Earths Oceans arrived 4.4 billion years ago. Now i distinctly remember my science teacher explaining to a class of bored 12 year old's that water can be in one of three states, frozen, liquid or a gas.
So water is either locked up in ice at the poles, sloshing about with whales peeing in it as oceans or floating above us as clouds or steam and the water goes through this cycle again and again with no new water being added or any taken away.
My question then is the cup of tea that i am drinking as i write this, is the water i used to make it 4.4 billion years old?
My second question then is if it is 4.4 billion years old, it has obviously been through the full scale of what water can be, so it has been a cloud, part of a sea, in rivers, steam and in peoples toilet cisterns and also inside people and then expelled as urine.
In that case how many peoples and other creatures bodies has my cup of tea been through before i drink it and after i expel it, where will it go after the sewer spits it out into the English Channel and how long before it ends up in another persons cup?
I'm suddenly not that thirsty.