How Arctic shores are pulled a-sea  (p. 18)

Sunshine vitamin’s potential health benefits stir up, split scientists (p. 22)

The wreckage of the Genesis probe yields a bonanza of discoveries about conditions in the early solar system. (p. 5)

In a violation of textbook biology, a modified RNA component can cause the cell's protein-making machinery to run genetic stop signs. (p. 8)

In mice, injecting a protein spurs the organ’s own stem cells to regrow small amounts of tissue after damage. (p. 9)

Illumination triggers control of blood sugar in mice implanted with engineered human cells. (p. 9)

Body temperature of long-gone beasts resembled that of mammals, study of fossil teeth suggests. (p. 10)

Female birds stray from their mates in part because of cheating genes from their philandering fathers, a zebra finch study suggests. (p. 10)

A yeast experiment recapitulates a major early milestone in the history of life. (p. 11)

Three lines of evidence suggest that the sun’s next activity cycle will be delayed for years and may not happen at all, an outcome that could have major implications for Earth’s climate. (p. 12)

The latest data from a NASA spacecraft give compositional clues and reveal craters that could hold frozen water (p. 12)

A spike that began during the 19th century appears to be linked to rising temperatures and increasing greenhouse gases. (p. 13)

Earth’s bulging waistline, plus ancient mangrove swamps and new threats from wildfires in this week’s news. (p. 13)

In lab experiments, physicists trying to understand earthquakes are bumping up against the limitations of existing theory. (p. 14)

Physicists reach out and touch an equation. (p. 14)

A glowing cell can produce laser light. (p. 15)

A physicist develops a rule of thumb for getting the ball in the hole. (p. 15)

An analysis of collagen structure finds protective pockets, backing up claims of preserved tissue finds. (p. 16)

Made from any number of materials, fibers are millionths of a millimeter across and kilometers long. (p. 16)

A potential fast-acting treatment boosts the brain chemical BDNF, which may be lacking in depression. (p. 17)

No link between viral suspect and chronic fatigue, plus reading minds, colored glasses for migraines and more in this week’s news. (p. 17)

The health benefits of wheat and olive oil, plus Down syndrome dementia, a heartbreaking gene and more in this week’s news. (p. 17)

Review by Tina Hesman Saey (p. 28)

Review by Laura Sanders (p. 28)

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After more than 80 years, a theory that too little vitamin D led to the demise of the dinos still awaits a shred of evidence. (p. 32)