Real-life Transformer: Scientists on video of robot that flies, rolls & walks

Scientists in the US have unveiled a new robot that can roll on four wheels, turn its wheels into rotors to fly, and "walk" by using its wheels like feet. Dubbed M4 (for Multi-Modal Mobility Morphobot), scientists called it a "real-life Transformer". It could have applications ranging from transporting the injured to hospitals to exploring other planets, the scientists said.