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Materials Science

New device can transmit underwater sound to air

A newly created metamaterial takes a shot at solving the problem of hearing underwater sounds from the surface.

Computing

Your phone is like a spy in your pocket

Smartphones’ powers of perception make them more user-friendly and efficient. But they also open new opportunities for privacy invasions.

Astronomy

Stars with too much lithium may have stolen it

Some small stars have extra lithium before they grow old, suggesting they get extra amounts of the element from an external source.

Tech

New technique could help spot snooping drones

There may be a new way to tell if a drone is creeping on you or your home.