Fire-ant rafts inspiring materials science research

When taking a closer look, nature is oftentimes the best model for advancing our technology. Plants have taught us the importance of light energy, and now insects are sparking ideas in materials science. The fire-ant, an insect feared for its stinging, venom-injecting bite, is being studied for its "viscoelastic" properties. Viscoelastic materials not only resist shear flow and strain when a stress is applied, like honey, but also bounce back to their original shape when stretched out or compressed, like rubber bands. Therefore, these materials are neither solid nor liquid, but a combination of both, like Jell-O and toothpaste. Fire-ants form rafts in the presence of any forceful liquid, but not just any typical ant raft. These rafts actively reorganize their structure. This allows them to more effectively cushion themselves against applied forces, such as raindrops or wave surges.



http://www.enn.com/wildlife/article/46729