Water – from another world
"Around 5 billion years ago, all the ingredients for our oceans were floating in a planetary nebula." The BBC's article on The Alein Origins of Earth's Oceans explained that "... these oceans have not always existed on our planet. And the water within them is alien, arriving here many hundreds of millions of years after the Earth first took shape, 4.5 billion years ago. Back then, the surface of our planet was an unrecognisable hell - volcanic and bone dry." "Our oceans’ water, the substance precious to every life form and which has come to define our planet, arrived in…