Cells reach out and touch each other with tunneling nanotubes (p. 16)

Archaeologists tracing the labyrinth of antiquities trafficking hope to shut it down, or at least slow it up (p. 20)

Controlling light’s path could enable invisibility or harness an intriguing but so far elusive stretch of the spectrum (p. 24)

Latest studies focus on estrogens, androgens and IGF-1. (p. 5)

A mathematical constant that emerges only in the unusual conditions of specific black hole systems has shown up in a simple Newtonian system. (p. 8)

In an experiment, scientists show that, although it takes generations, fish can rebound from evolutionary pressures created by selective harvesting, which has pushed some populations to become small and slow-growing. (p. 9)

Inward-facing palms evolved much earlier than previously recognized, a new study finds. (p. 9)

A study in mice suggests a version of prion proteins, which are known to cause the brain-wasting mad cow and Creutzfeldt-Jakob diseases, may also play a role in neuron malfunction. (p. 10)

Acid-blocking drugs commonly prescribed to cardiac patients upon hospital discharge seem to interfere with an anticlotting drug. (p. 11)

An experimental drug called mepolizumab prevents some emergency asthma attacks in people who no longer benefit from normal doses of steroids. (p. 11)

Research shows a standard drug for treating brain cancer can actually make some cells more aggressive. (p. 11)

Researchers have uncovered a genetic link between autism and gastrointestinal disorders in some families. (p. 11)

Star students receive more than $530,000 in scholarships and prizes in the Intel Science Talent Search. (p. 12)

Scientists investigate the physics of the most printable ink and find the most viscous inks don’t make the grade. (p. 13)

Researchers say that 1.5-million-year-old footprints discovered in eastern Africa show that a human ancestor had modern-looking feet and walked much like people do today. (p. 14)

New lines of evidence indicate that horses were domesticated for riding and milking more than 5,000 years ago by members of a hunter-gatherer culture in northern Kazakhstan. (p. 15)

Preteen boys and girls interacting in a virtual world display the same contrasting play styles that have been observed in real-world settings. (p. 15)

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Review by Laura Sanders (p. 30)

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