of the surface what people are looking for. talk a little bit about beneath the surface what we're talking about. this isn't like a swimming pool, right? this isn't clear watter where there's nothing below. >> no, this is not clear water with nothing below. the depth to the sea floor is roughly about two miles below the surface of the ocean and if you go all the way down to the sea floor it's a part of the mid-ocean ridge system. so it's very rough terrain, it's a part of a continuous string of volcanos that are like a zipper through middle of all the ocean basins and so it's deep, it's rough, and it's very poorly explored because of the rough conditions and the remoteness. >> so you have an inhospitable territory and the prime minister of australia calling it specifically that. enough under sea that is already craggy, mountainous beneath the water and now we're learning there could be other things in the water that maybe could have