Inventors at MIT have found a way to use a computer mouse without one actually being there. You cup your hand, move and tap it on the table, but your hand holds only air.
An infared laser beam and camera work to track your hand, palm and finger movements, and set them with the appropriate computer responses. You can scroll, click and tap just like you're using a real mouse.
The project is called "Mouseless." According to the leader of the project, Pranav Mistry, a working prototype only costs $20 to build.
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