Engineers at Harvard School of Engineering and Applied Sciences (SEAS) have created a robotic cockroach that can swim and walk underwater. The robot, known as Harvard's Ambulatory Microrobot or HAMR, uses specialized foot pads that rely on surface tension to walk on land and swim. When it needs to sink to the bottom, the robotic cockroach breaks the surface tension by applying a voltage to the water in a process known as electrowetting. The robots size and flexibility allows it to explore spaces not easily accessible. Read more about the robotic cockroach at Harvard SEAS.