Seems to be a lot of 'giant' discoveries of late
http://www.nature.com/news/underwater-volcano-is-earth-s-biggest-1.13680
http://news.nationalgeographic.com/...ky-rise-largest-volcano-oceanography-science/
http://www.nature.com/news/underwater-volcano-is-earth-s-biggest-1.13680
http://news.nationalgeographic.com/...ky-rise-largest-volcano-oceanography-science/