Exactly, the first one via a simple google search on the first author's name:

http://www.lpi.usra.edu/meetings/lpsc2013/pdf/1685.pdf

So it is a conference paper, freely available now too. Looking that over, it seems it's that typical short dense sort. Conferences tend to limit the length of papers. Science being more general interest, I would expect that paper to have more prose, background info, and images.