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Abstractions blog

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Illustration of a placenta that is a mosaic of different colors, with a connected fetus that is all one color.
genomics

New Genomic Study of Placenta Finds Deep Links to Cancer

By Max Kozlov
April 8, 2021
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A patchwork of genomic differences in the placenta may explain the organ’s “live fast, die young” strategy and its connections to cancer.

planetary science

Iceland’s Eruptions Reveal the Hot History of Mars

By Robin George Andrews
April 6, 2021
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The new volcanic fissures are more otherworldly than they first appear.

A graphic showing that changing any of the digits of 505, 447 turns it into a composite number
prime numbers

Mathematicians Find a New Class of Digitally Delicate Primes

By Steve Nadis
March 30, 2021
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Despite finding no specific examples, researchers have proved the existence of a pervasive kind of prime number so delicate that changing any of its infinite digits renders it composite.

Spheres representing black holes, with small ones on top, large ones on the bottom, and one midsize example in the middle.
astrophysics

Long-Missing Midsize Black Hole Flashes Into View

By Jonathan O'Callaghan
March 29, 2021
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Black holes seemed to come only in sizes small and XXL. A new search strategy has uncovered a black hole of “intermediate” mass, raising hopes of more to come.

Orange hills (polaritons) against a black background. Below each hill, an arrow points to an angular position on a circle.
explainers

The Near-Magical Mystery of Quasiparticles

By Thomas Lewton
March 24, 2021
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The zoo of spontaneously emerging particlelike entities known as quasiparticles has grown quickly and become more and more exotic. Here are a few of the most curious and potentially useful examples.

A graphic showing improvements in the speed of matrix multiplication
algorithms

Matrix Multiplication Inches Closer to Mythic Goal

By Kevin Hartnett
March 23, 2021
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A recent paper set the fastest record for multiplying two matrices. But it also marks the end of the line for a method researchers have relied on for decades to make improvements.

An illustration of a bright blue flash in space.
astrophysics

New Kind of Space Explosion Reveals the Birth of a Black Hole

By Jonathan O'Callaghan
March 10, 2021
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A supernova-like explosion dubbed the Camel appears to be the result of a newborn black hole eating a star from the inside out.

A house of cards propped up by a letter i, the unit of imaginary numbers.
quantum physics

Imaginary Numbers May Be Essential for Describing Reality

By Charlie Wood
March 3, 2021
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A new thought experiment indicates that quantum mechanics doesn’t work without strange numbers that turn negative when squared.

Photograph showing cirrus clouds in a blue sky above an expanse of flat, snow-covered ice.
Abstractions blog

Cloud-Making Aerosol Could Devastate Polar Sea Ice

By Max Kozlov
February 23, 2021
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An overlooked but powerful driver of cloud formation could accelerate the loss of polar sea ice.


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