A new acid-powered micro-rocket could be used to deliver drugs within the human body.

The micro-rocket works by converting acid into a stream of hydrogen gas that is then pumped out of the rocket, creating thrust. This acid-converting ability allows the micro-rocket to operate in acidic environments, such as the human stomach.

The micro-rocket is just ten microns in length (one micron = 0.0001 centimetres) and is capable of travelling at 640km/h.