You get lost on a mountain and your cell phone battery goes flat. How do you get help? You help yourself by walking, wearing a featherweight biomechanical device which harvests energy from the movement of your body. CUHK Professor Wei Hsin Liao explains how a moving knee can generate electricity.

There is a new way to deploy the right microrobotic swarm into a bodily fluid to fight illness. A research group of the Faculty of Engineering has categorised magnetic swarming microrobots and devised ways to select the one that navigates best in a bio-fluid, taking treatment into the vascular system and other confined regions of the body.