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THE LIVING GÖMBÖC
Gömböc shape helps Indian Star Tortoises to
self-right themselves.
Self-righting is a lifesaving exercise for
turtles. Flat, aquatic turtles use their long,
muscular neck, on the other hand, many
terrestrial species are unable to self-right on
a horizontal surface.
It is remarkable that from among
approximately two hundred extant turtle
species a few (among them the Indian Star
Tortoise) have evolved, over millions of years,
shells that come sufficiently close to a Gömböc
shape to admit self-righting under gravity.
Biologists often cite this fact as an amazing
example on the complexity of evolution.
source: curiosity.com