A portrait of the U2 frontman wasn’t our first pick for the cover of the January/February issue. But as the magazine came together, it seemed the clear choice. Here’s how it happened.
Chinese physicists use ghost imaging technique to make 3D images with a single pixel
A small cell network over the company's HQ could herald new competition for established carriers.
Could the social network ever become something like a carrier?
A discovery from a Korean research team gets us closer.
"Character-driven dialogue" will help the virtual assistant evolve, says an Apple job ad.
A new computer simulation shows how the flight delays spread across the US airport network like wildfires
Operating systems that support open Web standards could undermine tightly-controlled marketplaces for mobile apps.
Physicists are using "ideal gas-like" experiments to measure the diffusion of swarms of creatures, an approach that could revolutionise the way researchers understand group behaviour
A project in flux, though with great promise.