IS-Block represents quite a different challenge, while the volume of IS-Block is absolutely finite (at only 600,000 kilometers deep and 1,000 wide no less) it branches, splintering into what can only be estimated as trillions of different tunnels. Because this chasm is entirely exploreable scientific teams from all places in the sector and beyond have come to do so, but few make it back and although it has been made clear through every step of the process to get approval that this is the case they keep coming. The few teams that have returned describe mind bending but clearly natural structures and inner spaces upon inner spaces that seem to have no end. All attempts to gather samples have proven fruitless as IS-Block is composed of an unknown alloy that even when mined out properly disintegrates, the prevailing theory is that some of the same nano-tech which makes up the super/structures of ON make up this alloy but it is yet to be proven in any case.