Invisibility cloaks slim down
![skin cloak](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/09/ticker_skincloak_free-1.jpg?fit=860%2C460&ssl=1)
SLEEK AND EFFECTIVE An ultrathin invisibility cloak hides objects by coaxing light waves to rebound as if they had struck a flat surface, as seen in this illustration.
Courtesy of Xiang Zhang group, Berkeley Lab/UC Berkeley