Friday, November 18, 2022

Computer Proof ‘Blows Up’ Centuries-Old Fluid Equations

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FLUID DYNAMICS | ALL TOPICS

 

Computer Proof 'Blows Up' Centuries-Old Fluid Equations

By JORDANA CEPELEWICZ

For more than 250 years, mathematicians have wondered if the Euler equations might sometimes fail to describe a fluid's flow. A new computer-assisted proof marks a major breakthrough in that quest.

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COSMOLOGY

 

Why This Universe?
New Calculation Suggests Our Cosmos Is Typical.

By CHARLIE WOOD

Physicists have calculated that the universe has a higher entropy — and is therefore more likely — than alternative possible universes.

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Related: 
Physicists Rewrite a Quantum
Rule That Clashes With Our Universe

By Charlie Wood

DEVELOPMENTAL BIOLOGY

 

The Gut Microbiome Helps Social Skills Develop in the Brain

By JOANNA THOMPSON

New research in fish suggests that gut microbes can have a crucial early influence on the brain's social development.

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Related: 
How Microbiomes
Affect Fear

By Elena Renken (2019)

QUANTIZED COLUMNS

 

How to Think About Relativity

By SEAN CARROLL

Albert Einstein's ideas about space-time aren't exactly intuitive, and they aren't exactly Einstein's, either.


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Around the Web

Thought-to-Speech
Researchers announced that they have developed a brain implant that can read words directly from a user's thoughts. The device could aid communication with people who are paralyzed or have other physical impairments, reports Laura Sanders for Science News. In science fiction, brain-machine interfaces often have the ability to control thoughts and behaviors. But in 2021 R. Douglas Fields wrote for Quanta about why real-world technology is still far from achieving these capabilities.

New Win for MOND
A new calculation shows that a controversial alternative theory of gravity called Modified Newtonian Dynamics (MOND) accurately predicts how star clusters break apart, reports Sam Jarman for Physics World. Physicists have struggled to find a version of MOND that is consistent with all astrophysical observations. In 2020 Charlie Wood wrote for Quanta about a new formulation that finally managed to describe the cosmic microwave background.
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