Nightly News   |  December 03, 2012

Mars rover discovers complex chemicals

There’s no way yet of knowing whether or not the matter originated on Mars or landed there from somewhere else. NBC’s Brian Williams reports.

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This content comes from Closed Captioning that was broadcast along with this program.

>>> two weeks ago, we were given a heads-up that the mars rover team and nasa may have an announcement for us that may be one for the history books. well, most assumed they found a sign of life, perhaps in a soil sample. today that evidence was not that big of news. they found complex chemistry within mars's soil that included hints of carbon, there