News
- Physics
One-molecule chemistry gets big reaction
Carrying out a widely used chemical reaction on one molecule at a time, researchers demonstrate unprecedented control of molecular behavior and, possibly, the ability to make novel nanotechnology devices and compounds that can't be created with ordinary chemistry.
- Computing
Virtual stampede sees faces in crowd
A new computer model based on particle interactions suggests ways to prevent a panicked crowd from stampeding.
- Physics
Electron breakup? Physics shake-up
A controversial theoretical proposal that challenges more than a century of theory and experiments suggests that loose electrons in liquid helium may break into pieces, dubbed electrinos.
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Abused kids lose emotional bearings
Physical abuse and neglect appear to undermine preschoolers' emotional development in different ways.
