Well, they're more akin to a mix of heptagon, hexagon, and the
  five sided one... and however else they end up tongue emoticon
  But shapes that are mostly spherical-ish in shape stuck to a two
  dimensional-ish surface (like the curved back of the inside of
  your eyeball) pack in sorta hexagonal packing form. I mean we
  gotta map it out on 2D paper, on 2D screens tongue emoticon So
  yeah, it's kinda a triangular grid, kinda hexagonal, but like
  most maps, a bit of information gets lost in the process of
  simplification smile emoticon