Issue for the week of April 21st, 2012

High-speed videos capture rocks flying at unheard-of rates (p. 20)

Scientists seek a cough remedy that really delivers relief (p. 22)

Having the right blend of animal personalities can make or break a group (p. 26)

Chemical reactions in the early solar system create complex organic molecules. (p. 5)

Spacecraft images reveal Mercury has a complicated inside and an active geologic past. (p. 8)

Change in elevation of cloudy layer suggests seasonal cycles on Saturn?s moon. (p. 8)

Spacecraft explorations reveal a layered, beat-up celestial body. (p. 9)

Geologic activity and weather on Saturnian moons, and studies in Greenland to learn about Mars. (p. 9)

Damage to blood vessel lining shows up in blood tests. (p. 10)

Neuroscientists create a synthetic recollection of fear in rodents. (p. 10)

The discovery of a hormone-like molecule in the scalp may offer new clues for treating baldness. (p. 11)

Among older women, diseased blood vessels at the back of the eye are linked to lower scores on mental tests and other signs of possible ministrokes. (p. 11)

New 3-D structures of opiumlike drugs bound to the body?s proteins will aid the development of better painkillers and the battle against drug abuse. (p. 12)

Applying pressure to a building block of plastic in water, researchers generate enough energy to make your Nikes glow and do other chemical work. (p. 12)

Scientists create a chemical switch that can catch and release the useful gas. (p. 13)

Fossil comparison fends off a challenge that holds the dinosaur is but the immature version of the Torosaurus. (p. 14)

A gene involved in taste detection has glitches in some, but not all, highly carnivorous mammals. (p. 14)

Trees and wildflowers register the effects as animals flee (or not) from grinding engines. (p. 15)

Biological deception may give crustaceans an advantage during a fight. (p. 15)

The first gorilla genome and a more detailed look at chimp genetics provide new clues to evolution of humans and their closest relatives. (p. 16)

Scouting behavior linked to certain molecules in insect brains. (p. 16)

Tiny particles alter normal vessel functions, animal studies show. (p. 18)

Estrogen mimics may delay puberty and honeybees hurting from pesticides (p. 18)

Review by Janet Raloff (p. 30)

Review by Allison Bohac (p. 30)

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Cutting calories to fight cancer (p. 32)

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