An amazing new technology could allow people who are paralyzed to write - using their minds. A special brain implant detects "attempted handwriting movements" by having the subject imagine they were writing normally with a pen and paper.  The implant then converts those brain signals into actual text on a computer screen. Researchers say the test subject was able to 'write' about 18 words per minute - only a bit slower than the average person can type on a smartphone.  The technology is still in early development, but could one day help people who have been partly paralyzed by spinal injuries or strokes.