These are my imagined undersea
creatures, mathematically designed based on hyperbolic
tessellations.

These are not actual, naturally occurring sand dollars.

If someday I am reincarnated as a sand
dollar in a parallel universe,
these are my fantasy echinerdermata mates.

These are made of nylon, by selective
laser
sintering.

Each is circular, about 6 inches in diameter and a quarter inch thick.

This and the next are made of ABS by fused deposition modeling. The above is 8 inches across.

Each is circular, about 6 inches in diameter and a quarter inch thick.

This and the next are made of ABS by fused deposition modeling. The above is 8 inches across.

Copyright 2007, George W. Hart