When Mercedes-Benz began to contemplate its next generation of high-efficiency small cars, it sought aquatic inspiration. But instead of considering obvious undersea hot rods like sharks, the Mercedes team turned to a fish that resembled a car: the tropical boxfish. A native of the Indo-Pacific region, the Ostracion cubicus is surprisingly slick. Wind-tunnel testing of a clay model revealed a drag coefficient (Cd) of just 0.06, startlingly close to the ideal 0.04 of a water droplet.

Steve Austin had that enviable telescopic squint. Star Trek chief engineer Geordi La Forge saw darkness as daylight with his 24th-century ocular implants. And now it looks like a generation of very real people who have lost their sight are next in line for such seemingly sci-fi vision. “I’m hesitant to use the word ’superpower,’ ” says Armand R. Tanguay, Jr., an electrical-engineering professor at the University of Southern California who is building the world’s first implantable camera for the blind.