New research indicates that comets may have been responsible for the creation of our planet's oceans. We know comets have lots of water but we now know that some comets have have that is very similar to our planet's ocean water.
This is not a new idea but the research adds evidence to it being true. Be sure to check it out: http://www.jpl.nasa.gov/news/news.cfm?release=2011-312
![New measurements from the Herschel Space Observatory have discovered water with the same chemical signature as our oceans in a comet called Hartley 2](http://www.jpl.nasa.gov/images/herschel/20111005/pia14738-640.jpg)
Sky Guy in Sunny at Last VA
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