Theoretical physicist Michio Kaku describes some of the inventions he thinks will appear in the coming century — including Internet-ready contact lenses, space elevators and driverless cars — in his book Physics of the Future.
Imagine being able to access the Internet through the contact lenses on your eyeballs. Blink, and you'd be online. Meet someone, and you'd have the ability to immediately search their identity. And if your friend happens to be speaking a different language, an instantaneous translation could appear directly in front of you.
That might sound farfetched, but it's something that might very well exist in 30 years or less, says theoretical physicist Michio Kaku.
"The first people to buy these contact lenses will be college students studying for final exams," he tells Fresh Air's Terry Gross. "They'll see the exam answers right in their contact lenses. ... In a cocktail party, you will know exactly who to suck up to, because you'll have a complete read out of who they are. President Barack Obama will buy these contact lenses, so he'll never need a teleprompter again. ... These already exist in some form [in the military]. You place [a lens] on your helmet, you flip it down, and immediately you see the Internet of the battlefield ... all of it, right on your eyeball."