In a recent study, the hidden mechanisms underpinning lizards’ capacity to maintain or drop their tails and flee have been discovered. The investigation discovered that the magic trick was performed by small mushroom-shaped structures, an understanding that might lead to some pretty cool future technology.
Lizard tails are intriguing because, while they can be dropped at any time, they remain quite securely connected the rest of the time. It wouldn’t be all that spectacular to drop a weakly linked limb, but how can such a powerful relationship shatter in an instant?
Researchers in a recent report published in the journal Science used microscopy to find out. They examined the surfaces of broken tails along the “fracture plane” in more detail. They discovered a densely packed layer of mushroom-shaped micropillars topped with a scattering of nanopores when each muscle splits.
The researchers developed simulation models to investigate how these structures may maintain such a strong grip on tails before completely discarding them. They discovered that under strain, the skillfully formed mushroom micropillars were extremely sticky. All of that, though, may alter with a tiny twist.
They discovered that the bending of the tail plays a critical part in kicking off the tail drop after photographing a tail breaking using a high-speed camera and slowing down the footage. As the tail bends, a crack forms on the bent side first, and then the tail goes bye-bye.
Autotomy is a protective mechanism in which a limb (or perhaps your entire body, as in the case of some sea slugs) is self-amputated. If lizards are being chased, the physiological magic trick allows them to abandon their tails, which operate as a distraction to predators since they may wriggle for a long period after being removed.
While humans don’t have much need for lowering a leg at any time, knowing such a powerful quick-release mechanism might have adhesion-related applications such as enhancing skin grafts and wound healing. Soft robotics and 3D bioprinting might benefit from it as well.
In a statement, research author Animangsu Ghatak stated, “Autotomy shows to be a successful survival technique in the natural world, and its frequency in both plants and animals offers confidence that it may be valuable for scientific and technical applications.”
“An optimized connection like the one found at the lizard tail may go a long way in safeguarding an expensive component or device from an unanticipated accident or disaster, especially in robotics, stealth technologies, and prosthetics, as well as for the safe functioning of many key installations.”
Having a quick-release tail, on the other hand, may be a lot of fun…