Researchers have made the first maps of corporate stock ownership for the stock markets of a large number of countries, 48 in all. The analysis reveals that a few big players constitute backbones of ownership.

Iron-based materials allow 3-D current flow, open new doors for understanding superconductivity. (p. 8)

A team is the first to transfer a qubit, which contains quantum information, from one atom to another, a feat that could aid quantum computing and secure communication.

Nanoscale MRI-like machine images individual virus shapes; first step to seeing proteins in 3-D

A mathematician fine-tunes how to blend crime records, geography to track down serial criminals. (p. 14)

New equations help solve decades-old puzzle of why one species doesn’t always outcompete another. (p. 14)

A study of the physics of phonons, quantum packets of heat, suggests that controlling the flow of heat could be another way to store digital information. (p. 10)

Simulations of helium-4 show that a superglass, in which atoms flow without friction, is possible.

Scientists alter E. coli microbes to make a high-energy alcohol not produced naturally

Cooperation wins out over betrayal when successful prisoners recruit followers.