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Illustration of a brain surrounded by castle walls that keep out blood vessels.
explainers

How the Brain Protects Itself From Blood-Borne Threats

By Yasemin Saplakoglu
June 20, 2023
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To buffer the brain against menaces in the blood, a dynamic, multi-tiered system of protection is built into the brain’s blood vessels.

artificial intelligence

Neural Networks Need Data to Learn. Even If It’s Fake.

By Amos Zeeberg
June 16, 2023
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Real data can be hard to get, so researchers are turning to synthetic data to train their artificial intelligence systems.

dynamical systems

Flow Proof Helps Mathematicians Find Stability in Chaos

By Jordana Cepelewicz
June 15, 2023
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A series of new papers describes how to fully characterize key dynamical systems with relatively little data.

The Joy of Why

What Causes Giant Rogue Waves?

By Steven Strogatz
June 14, 2023
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Wave-science researcher Ton van den Bremer and Steven Strogatz discuss how rogue waves can form in relatively calm seas and whether their threat can be predicted.

A chemically stained mouse embryo and mouse embryo model against a black background.
developmental biology

‘Embryo Models’ Challenge Legal, Ethical and Biological Concepts

By Philip Ball
June 13, 2023
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With embryolike constructs built entirely from stem cells, researchers can revolutionize our understanding of development. But how close to an embryo is too close?

An illustration of a ballooning helium nucleus, in three stages. The protons are orange, and the neutrons are red. In the first panel, the nucleus is compact. As it expands, the protons and neutrons move away from one another.
nuclear physics

A New Experiment Casts Doubt on the Leading Theory of the Nucleus

By Katie McCormick
June 12, 2023
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By measuring inflated helium nuclei, physicists have challenged our best understanding of the force that binds protons and neutrons.

A robot hand plucks a puzzle piece with a particle from a mostly empty puzzle.
neural networks

Sparse Networks Come to the Aid of Big Physics

By Steve Nadis
June 8, 2023
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A novel type of neural network is helping physicists with the daunting challenge of data analysis.

Researcher Chris German standing beside a remotely operated vehicle at the Woods Hole Oceanographic Institute.
Q&A

An Explorer of Abyssal Depths Looks to Oceans on Other Worlds

By Steve Nadis
June 7, 2023
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The marine geochemist Chris German brings decades of experience studying seafloor hydrothermal vents to NASA’s preparations for visits to other ocean worlds in our solar system.

An illustration of a black hole made out of computer circuits.
quantum information theory

In New Paradox, Black Holes Appear to Evade Heat Death

By George Musser
June 6, 2023
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The puzzling behavior of black hole interiors has led researchers to propose a new physical law: the second law of quantum complexity.


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