All Articles

Illustration of a hanging mobile with "Planet 9" weighing down 2015 BP519's orbit, thus tilting it.
planetary science

A New World’s Extraordinary Orbit Points to Planet Nine

Astronomers argue that there’s an undiscovered giant planet far beyond the orbit of Neptune. A newly discovered rocky body has added evidence to the circumstantial case for it.

Photo of Judea Pearl
Q&A

To Build Truly Intelligent Machines, Teach Them Cause and Effect

Judea Pearl, a pioneering figure in artificial intelligence, argues that AI has been stuck in a decades-long rut. His prescription for progress? Teach machines to understand the question why.

Crystal diffraction art for "A Chemist Shines Light on a Surprising Prime Number Pattern"
prime numbers

A Chemist Shines Light on a Surprising Prime Number Pattern

When a crystallographer treated prime numbers as a system of particles, the resulting diffraction pattern created a new view of existing conjectures in number theory.

Lede photo for "How Vaccines Can Drive Pathogens to Evolve"
immunology

Vaccines Are Pushing Pathogens to Evolve

Just as antibiotics have bred resistance in bacteria, vaccines can potentially lose their effectiveness over diseases they controlled. Researchers are working to head off the evolution of new threats.

Art for "Artificial Neural Nets Grow Brainlike Navigation Cells"
Abstractions blog

Artificial Neural Nets Grow Brainlike Navigation Cells

Faced with a navigational challenge, neural networks spontaneously evolved units resembling the grid cells that help living animals find their way.

Photo of Large Magellan Cloud rotating clockwise.
Abstractions blog

What Astronomers Are Learning From Gaia’s New Milky Way Map

A roundup of some of the most important discoveries gleaned so far from the Gaia space observatory’s new map of the galaxy.

Art for "A Thermodynamic Answer to Why Birds Migrate"
ecology

A Thermodynamic Answer to Why Birds Migrate

New modeling studies suggest that birds migrate to strike a favorable balance between their input and output of energy.

Art for "Three Decades Later, Mystery Numbers Explained"
Abstractions blog

Three Decades Later, Mystery Numbers Explained

Zeta values seem to connect distant geometric worlds. In a new proof, mathematicians finally explain why.

Lede art for "Viruses and Cell Vesicles: Different, but Two of a Kind"
cell biology

Cells Talk in a Language That Looks Like Viruses

Disease-causing viruses and message-carrying vesicles sit at the ends of a spectrum of membranous particles that cells release.