In This Issue: Features
50 Smartest Companies
Name recognition doesn’t matter on this list. It’s about the companies that are changing things right now.
Precise and easy ways to rewrite human genes could finally provide the tools that researchers need to understand and cure some of our most deadly genetic diseases.
An Artificial Hand with Real Feeling
A new nerve interface gives a sense of touch to a prosthetic limb.
In This Issue: Reviews
For its wearable computer to be accepted, Google must convince people that the device isn’t creepy.
An AI Pal That Is Better Than “Her”
The charming automated assistant in Spike Jonze’s new movie isn’t realistic. But if they were designed thoughtfully, computerized interlocutors could make us better people.
Bitcoin itself may fail as a currency, but the underlying technology is beginning to suggest valuable new applications.
In This Issue: Departments
Storing the Sun
Aquion manufactures cheap, long-lasting batteries for storing renewable energy.
From the Archives
A 1985 essay saw hope—and immense challenges—for systems that might allow paralyzed people to walk again.