The idea of supervolcanoes on Mars was new to me, but it is not new to science. A search here indicates that this has not been posted here, so here a couple of cool links from results that were published in Nature in 2013.
NASA Release: Mars Crater May Actually be a Supervolcano
Nature Release: Giant depressions may be ancient eruptions
I found this really cool video from Nature. Supervolcanoes on Mars
This seems to be a wonderful example of research on Mars increasing the understanding of our own planet.