Feeling objects that aren't there

Imagine this. You wake up in the morning to the irritating buzz of your alarm. Instead of fumbling for a snooze button, you wave your hand in the air in the general direction of the clock. There, in mid-air, you find it: an invisible button. It’s an illusion you can feel, like a hologram for your fingers. One swipe at the button, and the alarm shuts of ... Read more »