All Articles

astrophysics

The Particle That Broke a Cosmic Speed Limit

May 14, 2015

Physicists are beginning to unravel the mysteries of ultrahigh-energy cosmic rays, particles accelerated by the most powerful forces in the universe.

Biology

Animal Copies Reveal Roots of Individuality

May 12, 2015

Genetically identical animals raised under similar conditions can make very different choices. These distinctions are helping researchers map the biological basis of individuality.

evolution

A Surprise for Evolution in Giant Tree of Life

May 5, 2015

The largest evolutionary tree ever compiled leads researchers to conclude that chance mutation — not natural selection — drives the development of new species.

The Quantum Fabric of Space-Time

Interactive: What Is Space?

April 30, 2015

Imagine the fabric of space-time peeled back layer by layer.

The Quantum Fabric of Space-Time

How Quantum Pairs Stitch Space-Time

April 28, 2015

New tools may reveal how quantum information builds the structure of space.

The Quantum Fabric of Space-Time

Wormholes Untangle a Black Hole Paradox

April 24, 2015

A bold new idea aims to link two famously discordant descriptions of nature. In doing so, it may also reveal how space-time owes its existence to the spooky connections of quantum information.

Q&A

Concerns of an Artificial Intelligence Pioneer

April 21, 2015

Computer scientist Stuart Russell wants to ensure that our increasingly intelligent machines remain aligned with human values.

origins of life

How Structure Arose in the Primordial Soup

April 16, 2015

Life’s first epoch saw incredible advances — cells, metabolism and DNA, to name a few. Researchers are resurrecting ancient proteins to illuminate the biological dark ages.

Mathematics

For Persi Diaconis’ Next Magic Trick …

April 14, 2015

A mathematician who has analyzed card shuffling for decades is tackling one final nemesis: “smooshing.”