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Science News for January 3, 2020


Clusters of gold atoms form peculiar pyramidal shape

Researchers have discovered that freestanding gold clusters of twenty atoms take on a pyramidal shape with a triangular ground plane and additional triangles. The study reveals the cluster's unusual electronic structure, which is similar to noble gas atoms or aromatic molecules, making them less reactive.

SourceKU Leuven·JournalScience Advances·DateJan 3, 2020

Atlantic and Pacific oscillations lost in the noise

A team of meteorologists found no consistent evidence for decadal oscillatory signals in global surface temperature observations. The researchers suggest that any apparent oscillation may be due to external influences like greenhouse gas and aerosol emissions. The study has implications for decade-scale climate predictability.

SourcePenn State·JournalNature Communications·DateJan 3, 2020

Versatile bile acids

Two Harvard Medical School studies show that bile acids promote differentiation and activity of T cells involved in regulating inflammation. Gut microbes convert bile acids into immune-signaling molecules that activate regulatory T cells and effector helper T cells. The work suggests possible therapeutic pathways for modulating intesti...

SourceHarvard Medical School·JournalNature·DateJan 3, 2020