Not only does student participation decline dramatically throughout the new generation of Web-based courses, but the involvement of teachers in online discussions makes it worse.
A small change to the theory of gravity implies that our universe inherited its arrow of time from the black hole in which it was born.
A new theoretical model suggests that quantum entanglement helps prevent the molecules of life from breaking apart.
Startup Cyclone Power thinks it has a way to replace internal combustion engines.
The ability to teleport photons through 100 kilometres of free space opens the way for satellite-based quantum communications, say researchers
Intelligent dust particles embedded in the brain could form an entirely new form of brain-machine interface, say engineers
A concept that animates hundreds of millions in Federal spending needs to be retired.
Cheap, simple water filters made of plant xylem could dramatically reduce the incidence of water-borne diseases in places without access to clean drinking water, say engineers.