A robotic assistant recently arrived at the International Space Station to perform a simulated surgery that will be controlled by a surgeon 250 miles away on Earth.

Plus, because it's entire less-than-a-millimeter robot body doesn't need wires or electricity to operate, it could even roam the human body one day, acting like some sort of dextrous, six-legged ...

The robot is small in size but its aspirations are out of this world — literally. MIRA, which stands for miniaturized in vivo robotic assistant, recently became the first surgical robot at the ...