Author Archives: rberkowitz

Cubes Keep Their Distance

Cubes suspended in a liquid are less likely than spheres to form clusters and fall out of solution. Read more in APS Physics…

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Counting All the Antistars in the Sky

Analyzing gamma-ray sources leads to an upper limit on how many antimatter stars could exist in the Milky Way. Read more in APS Physics…

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Laser-Cooled Atoms and Molecules Collide in a Trap

An experiment shows the circumstances under which ultracold atoms are quick to kick molecules out of a trap, providing clues for how to use atoms as a refrigerant for molecules. Continue reading

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Ancient lightning may have provided the phosphorus necessary for life

On early Earth, lightning strikes created glassy rocks that hosted abundant soluble minerals, which were rich in phosphorus, a vital ingredient in biomolecules. Continue reading

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A tabletop waveguide delivers coherent x rays

The layered anode emits bright, directed beams without the need for mirrors or large-scale accelerators. Continue reading

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Shape-Shifting Proteins Follow Diffusion Rules

How quickly a protein diffuses in a liquid depends directly on its radius, which changes as the protein’s conformation fluctuates. Continue reading

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Loopy Pipe Network Converts AC to DC

A simple network of pipes based on the structures of a bird’s lung transforms back-and-forth flow into one-way flow. Continue reading

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At-Home Experiment Exposes Gel Cracks

Kept out of the lab by COVID-19, an undergraduate student has performed experiments in his living room, revealing a mechanism for fracture elongation in soft materials. Continue reading

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Evolutionary insights into shape-shifting proteins

Over millions of years a protein that now folds into two stable structures likely favored first one configuration, then the other, before settling on both. Continue reading

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A tabletop waveguide delivers focused x rays

By simultaneously generating and guiding beams, the layered anode emits x rays in one direction without the need for mirrors or large-scale accelerators. Continue reading

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