Friday, April 21, 2023

A New Kind of Symmetry Shakes Up Physics

Math and Science News from Quanta Magazine
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MATHEMATICAL PHYSICS | ALL TOPICS

 

A New Kind of Symmetry Shakes Up Physics

By KEVIN HARTNETT

So-called "higher symmetries" are illuminating everything from particle decays to the behavior of complex quantum systems.

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COMBINATORICS

 

The Number 15 Describes the Secret Limit of an Infinite Grid

By KEVIN HARTNETT

With computer muscle and clever simplification, a grad student and his adviser solved a packing coloring problem that has kept mathematicians busy for two decades.

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Related: 
The Colorful Problem That Has
Long Frustrated Mathematicians

By David Richeson

Q&A

 

She Tracks the DNA of Elusive Species That Hide in Harsh Places

By RACHEL CROWELL;
Video by CHRISTOPHER W. YOUNG

On Mount Everest and in the Peruvian Andes, Tracie Seimon uses DNA to study how species and ecosystems respond to climate change, pathogens and other influences.

Read the interview | Watch the video


Related: 
Ancient DNA Yields Clues to Past Biodiversity

By Monique Brouillette (2019)

QUANTIZED COLUMNS

 

Why the Brain's Connections to the Body Are Crisscrossed

By R. DOUGLAS FIELDS

In all bilaterally symmetrical animals, nerves cross from one side of the body to the opposite side of the brain. There's no known biological reason for it, but geometry points to an answer.

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THE JOY OF WHY

 

How Can Some Infinities Be Bigger Than Others?

Podcast hosted by STEVEN STROGATZ

All infinities go on forever, so how is it possible for some infinities to be larger than others? The mathematician Justin Moore discusses the mysteries of infinity with Steven Strogatz.

Listen to the podcast

Read the transcript

Around the Web

Jellyfish Have a 'Cobweb of Neurons'
The invertebrates called comb jellies have a nervous system that's so fundamentally different from that of other animals, scientists now believe that their brains evolved separately from the brains of other animals, Jake Buehler reports for Science News. New research reveals that rather than being interconnected by synapses, a comb jelly's neurons are directly fused together. Scientists have long suspected that the comb jellies evolved their nervous system independently: Emily Singer reported for Quanta on preliminary evidence for it in 2015.


New Methods for Spotting Exoplanets
By combining two different exoplanet-search techniques, astronomers have discovered a new planet around another star — a giant world designated HIP 99770 b, reports Nola Taylor Tillman for Scientific American. As astronomers invent new ways to hunt for exoplanets, planets that have wider ranges of masses and of orbital distances from their suns become ripe for discovery. In 2020, Nola Taylor Tillman wrote for Quanta about a novel technique for detecting the auroras around giant planets.
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