The first woman in the world has been fitted with a robotic arm that she can control with her thoughts.
Claudia Mitchell, 26, from the US, lost her left arm in an accident. Her new arm lets her do things like do the dishes, fold clothes, and eat a banana.
The clever limb picks up movements in muscles in her chest which have been connected to nerves that used to link up to her arm.
That means she can make the arm move just by thinking about it!
She told reporters in Chicago: "I can move my elbow up and down and I can open and close my hand simply by thinking that that's what I want to do."
With her old fake arm, she could only do one thing at a time - either bend her arm or open her hand.
Complex movements
This new arm can make much more complicated movements.
It's hoped that eventually the technology will be so good that Miss Mitchell will be able to feel things with her fake limb.
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