Front Matter

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• Science and Culture: Modern “cathedral” offers artistic inspiration
  Grandeur is typically associated with feats of architecture, not scientific experiments. But one artist sees beauty in the curves of the LHC. Image courtesy of Jonathan Feldschuh (artist).

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• Inner Workings: Spotting gravitational waves using pulsar ticks
  Until recently, few researchers saw pulsars as a practical tool for the detection of gravitational waves. Image courtesy of Shutterstock/Dennis van de Water.

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• News Feature: Prehistoric animals, in living color
  Paleontologists are looking beyond bones to reveal the hues of prehistoric animals that vanished millions of years ago. But the young field has its share of disagreements. Image courtesy of Michael DiGiorgio (artist).

PNAS in the News

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• San Andreas tremors and low-frequency earthquakes
  Small, deep earthquakes in the San Andreas Fault are most likely to occur when the Earth tide waxes, a study suggests.
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• Common cold and temperature
  Researchers report that when human lung airway cells were exposed to warm temperatures replication of the common cold virus was restricted by increased cell death and the activity of a viral RNA-degrading enzyme, suggesting that independent of interferon-mediated inhibition of the common cold virus, body temperature likely influences multiple antiviral defense strategies and the progression of common cold infections.
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• Prebiotic chemistry on Titan
  Quantum mechanical calculations find that the electronic and structural properties of a polymer called polyimine, which is formed from hydrogen cyanide, a molecule that is likely central to prebiotic chemistry, could potentially facilitate prebiotic reactions under the ultra-cold conditions on Saturn’s moon Titan, according to a study.
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