In a lab at Columbia University, engineers have developed a strange yet clever way for robots to feel: Let’s call it the finger of light. It’s got a 3D-printed skeleton embedded with 32 photodiodes and 30 adjacent LEDs, over which is laid a squishy skin of reflective silicone, which keeps the device’s own light in and outside light out. When the robot finger touches an object, its soft exterior deforms, and the photodiodes in the skeleton detect changing light levels from the LEDs. This allows the system to determine where contact is being made with the finger, and the intensity of that pressure. In other words, if you shook this robot’s hand, it wouldn’t feel it, in a traditional sense; it would see it. (1)

So delicate. So soft.

Feeling without feeling.

Touching with light.

Knowing without knowing.

Living without life.

Let the robots touch you.

Underneath the cold light.

Your grandmother’s hands holding tight…