You all must be aware about Venus flytraps and how it attracts and devours insects which are its food. Just a tickle of their hair is enough to clamp their leaves and such responsive behavior has become necessary for advanced materials and devices and hence presents a challenge for the scientific and engineering world. The same environmental sensitivity has been replicated by material scientists on a nanometer scale. It is being said that dynamic control over the movement of surface nanofeatures at the micron and submicron scales presents applications in microfluidics, actuators and responsive materials. Researchers at the Bell Laboratories have created an adaptive material which covers a range of slender silicon nanocolumns with a layer of flexible hydrogel and depending upon the humidity level nanocolumns contract or swell. Joanna Aizenberg, Bell Laboratories stated: Such complex patterned movements would be impossible in the other reported artificial systems, in which polymers are actuated by an electric or magnetic field.