I was in front of the laptop, ordering a group of words to make a sentence, when I noticed a weird shine on the thumbnail of my right hand. Focusing on it, I discovered that it had turned into a small television screen. They were broadcasting, at that time, a newscast. I was stunned, of course. I found out right away that moving the right eyebrow changed the channel and that by blinking with the left eye the volume was raised while it was lowered by blinking with the right. The volume rose or fell only inside my head, because no one except me could hear it.
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Reference-www.elperiodico.com