Nemoptic's new e-paper technology is cheap and efficient enough to be used almost anywhere.
Mathematicians have derived the shape of a roller coaster that gives a perfectly smooth ride
Given the universal applicability of steganographic principles, next time the FBI might not be so lucky.
Infrared imagery in online maps lets homeowners see their energy efficiency.
Google's gambit pays off as China renews its license--but its Hong Kong site could still be blocked.
The best of the rest from the Physics arXiv this week
Physicists have finally discovered why a blue pigment used by the Mayans lasts so long.
Metallized xenon difluoride heralds a new class of solid fuels.
The compound boosts memory in elderly rats.
Why have so few heard of one of the great heroes of modern physics?