Inspiration for the next big technological¹ breakthrough in robotics, defense² systems and biomedicine could come from a seahorse's tail, according to a new study reported Thursday in the journal Science. The research centers on the curious shape of seahorse tails and was led by Clemson University's Michael M. Porter, an assistant professor of mechanical engineering.

 

Seahorse tails are organized into square prisms surrounded by bony plates that are connected by joints³. Many other creatures, ranging from New World monkeys to rodents⁴, have cylindrical⁵ tails.

 

Researchers wanted to know whether the square-prism shape gives seahorse tails a functional⁶ advantage.

 

To find out, the team created a 3D-printed model that mimicked⁷ the square prism of a seahorse tail and a hypothetical version that was cylindrical. Then researchers whacked⁸ the models with a rubber mallet⁹ and twisted and bent¹⁰ them.

 

Researchers found that the square prototype was stiffer, stronger and more resilient than the circular one when crushed. The square prototype was about half as able to twist, a restriction¹¹ that could prevent damage to the seahorse and give it better control when it grabs things.

 

Both prototypes could bend about 90 degrees, although the cylindrical version was slightly less restricted.

 

Porter said the seahorse tail could inspire new forms of armor. It could also lead to search-and-rescue robots that move on the ground like a snake and are able to contract to fit into tight spaces.

 

"We haven't gotten that far with the applications side of things yet, but we see a lot of potential with this device because it's so unique," Porter said.

 

The study's co-authors are Dominique Adriaens of Ghent University in Belgium; Ross L. Hatton of Oregon State University; and Marc A. Meyers and Joanna McKittrick, both of the University of California, San Diego.

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