3D-Printed Smart Gel Changes Shape When Exposed to Light

Inspired by the color-changing skin of cuttlefish, octopuses, and squids, engineers have created a 3D-printed smart gel that changes shape when exposed to light, becomes artificial muscle, and may lead to new military camouflage, soft robotics, and flexible displays. The team also developed a 3D-printed stretchy material that can reveal colors when light changes.