Brittle walk on four legs, and arbitrary used as the fifth head

The structure of most of the world's living creatures, including humans, have bilateral symmetry. You can draw a straight line along the body, which are divided into two identical halves. Brittle have radial symmetry that gives them amazing features.





Recent studies have shown that brittle able to assign any of its five limbs head and the other four used as legs. To turn, the animal does not need to turn around, and just change the "head" and continue.





In brittle stars, like sea stars, no brain, so it is not clear that coordinates their movement. In rare cases, it was observed that the animal can "confuse" the current head to foot, and to go "backwards". Yet this does not happen normally, then the movement of brittle star manages some ancient instinct. What - scientists have yet to figure out.

via factroom.ru