I just love when science and physics come together. It makes me a believer in our abilities as human inventors and copiers. On the left is a black and white (as they always are unless someone screws with them in photoshop) transmission electron micrograph of a nucleus, and they have pointed out an R-ring which is an internalized portion of the ER from either just the inner nuclear membrane, or outer and inner nuclear membrane together. Kudos to them for their assessment (publication is linked above).  And kudos also to whomever fabricated this colorful (which it is unless one choose just black and whites) polymer clay mokumu gane piece. The latter is a common technique among clay-lovers, pushing and folding and invaginating colors into other spaces, that tries to achieve what nature has done, and does, all the time.  Fun!!