Cornell University engineers have developed a way to mimic the arrangement of muscle tissue in an octopus tentacle using 3D printed soft robotics. Using an elastomer material and a stereolithographic 3D printer they created a complicated set of soft actuators that allows for an unprecedented level of agility and freedom of movement. The 3D printed tentacle was created using a stereolithography process called digital mask projection that selectively cures the layers of resin material with a high layer resolution to form highly complex internal structures, like those found inside of muscle tissue. The process leaves uncured resin inside of the structure that acts similarly to the fluid inside living muscle tissue. You can read more about this process over on 3DPrint.com: http://3dprint.com/100950/researcher...opus-tentacle/