SMART Surgical Tool in Chicken Embryo (video) The Optical Society Loading video... Caption This video shows how the SMART surgical tool is able to "hold still" by responding to unexpected movement from a surgical target (in this case, a chicken embryo). In the first part of the clip, the surgical tip of the SMART device has a good response to the unexpected embryo movement to keep a constant height. And then it is more stable at the latter part of the clip without the target's movement. Credit Courtesy Cheol Song, Johns Hopkins University. Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.