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The submitted title was "Rosetta first results: ocean water not from comets". Since the article's own title is not very informative, we changed it to the first sentence, which is. We also changed the url from http://blogs.esa.int/rosetta/2014/12/10/rosetta-fuels-debate..., which points to this.

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It would be great if edits like this could be displayed at the top of the thread rather than as the bottom-most comment.

I understand why you'd say that, but the cure would be much worse than the disease—the top subthreads would all be about the edits and editing practices.

It wouldn't have to be a replyable subthread, just a note somewhere are the top of the page.

Right. We don't have a very large sample size currently, so it's a bit premature for definitive statements such as "earthly water not from comets".

All we know is that this comet shows a different fraction of deuterium, compared to Earth, and some other comets we've checked are all different. So the jury is still out. We need more data, lots more.

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