To Zoom In, Bats Say "Ahh!"

In the future when touch screens are obsolete and we control our devices by facial gesture, maybe we'll zoom in and out the same way a bat does it. We'll open our mouths wide to narrow our field of focus. To see the bigger picture, we'll purse our lips tightly. But while we'll only be reading the news or shopping online, bats are operating one of the coolest sensory systems owned by a mammal. An Italian priest, Lazzaro Spallanzani, sent blindfolded bats through obstacle courses in the lat