I did read the article. I have now read the article again. Nowhere does it answer my question.<p>I can think of a number of natural mechanisms that would create water e.g. fire but none that could create the massive amounts of water to fill half of the oceans.<p>Was it life? If it was formed on Earth then where did all the hydrogen (and oxygen) come from?<p>If you look at the Wikipedia page about it it mostly dodges the question:<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Origin_of_water_on_Earth" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Origin_of_water_on_Earth</a><p>So, in case anyone here is more knowledgeable about the subject I&#x27;d be fascinated (and grateful) to here what the current theory is.