Google says using a small USB stick to vouch for your identity is more secure than either a password or conventional two-factor authentication.
A variety of new digital filters will make a photograph look vintage. The inauthenticity of the effect is irrelevant: it’s enough to evoke an audience’s sense of the past.
Online courses may not be changing colleges as their boosters claimed they would, but they can prove valuable in surprising ways.
Equipment for making microchips has led to solar cells that are twice as efficient as conventional ones.
Battery swapping is fast, but the economics are still uncertain.
A smartphone-connected device delivers electrical stimulation to nerves in the head.
Will ultrasound-on-a-chip make medical imaging so cheap that anyone can do it?