Natural History Magazine is published by the American Museum of Natural History, one of the world’s foremost collections in this field. The Magazine’s March 2009 issue contains an interesting paper entitled ‘The Living Gömböc’ on the connection between the Gömböc and some turtle species: certain tortoises developed Gömböc-shaped shells, enabling them to self-right, whereas turtles with flat shell use their long muscular neck for the same purpose.
Link to the article in Natural History Magazine about the turtles and the Gömböc:
Original paper about turtle geometry: