The Singularity Summit approaches this weekend in New York. But the Microsoft cofounder and a colleague say the singularity itself is a long way off.
In mice, stem cells derived from adult tissue can trigger immune rejection, even when matched to the tissue donor.
Not everyone thinks Google’s attempt to reinvent the computer will work.
The belief that a baseball can be hit further with a corked bat is wrong. But these illegal bats may still give an unfair advantage.
A new kind of time travel based on quantum teleportation gets around the paradoxes that have plagued other time machines, say physicists.
Researchers set up adult Web sites to study how the industry makes its money and spreads malware.
Quantum number generators produce random numbers that are measurably different from those that computer programs generate.
A version of the Turing Test now running in Second Life could one day prove that humanity is truly intelligent.
The best of the rest from the Physics arXiv preprint server.
A roundup of the most interesting stories from other sites, collected by the staff at MIT Technology Review.