India, July 1 -- Think of a future where your phone bends to fit your pocket, your medical implant softens inside your body, or robots change shape to squeeze through tight spaces. That future might be closer than you think, thanks to a new invention from researchers in South Korea.

Scientists at KAIST and Seoul National University have developed an "electronic ink" that can be printed into circuits which switch between hard and soft, simply by changing the temperature. This breakthrough could lead to a new generation of flexible electronics - gadgets that aren't just bendy, but can actually change how stiff or soft they are, depending on where and how they're used.

The secret ingredient is gallium, a metal that's solid at room temperat...