AstronomyMarch 1, 2019
Neutron Stars: Nature’s Weirdest Form of Matter
The insides of neutron stars—the densest form of matter in the universe—have long been a mystery, but it is one that scientists are starting to crack
Volume 28, Issue 2s
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Features
Black HolesFebruary 1, 2018
The Puzzle of the First Black Holes
Astronomers are puzzled about how the oldest supermassive black holes could have grown so big so early in cosmic history
Quantum PhysicsJune 1, 2017
Can Quantum Mechanics Save the Cosmic Multiverse?
A surprising connection between cosmology and quantum mechanics could unveil the secrets of space and time
Quantum PhysicsJuly 1, 2018
How Does the Quantum World Cross Over?
The universe according to quantum mechanics is strange and probabilistic, but our everyday reality seems nailed down. New experiments aim to probe where—and why—one realm passes into the other
The SciencesJanuary 1, 2019
Loopy Particle Math
Scientists are creating mathematical tools to identify novel particles and phenomena at the world's largest particle accelerator
The SciencesOctober 1, 2017
The Neutrino Puzzle
The largest experiment ever to probe these mysterious particles could point the way to new physics
The SciencesAugust 1, 2018
Is Dark Matter Real?
Astrophysicists have piled up observations that are difficult to explain with dark matter. It is time to consider that there may be more to gravity than Einstein taught us
Space & PhysicsJuly 1, 2017
Is Dark Matter Made of Black Holes?
A hidden population of black holes born less than one second after the big bang could solve the mystery of dark matter
Particle PhysicsSeptember 1, 2015
Lost in Thought—How Important to Physics Were Einstein’s Imaginings?
Einstein’s thought experiments left a long and somewhat mixed legacy of their own
Space & PhysicsJanuary 1, 2018
Searching for the Dark: The Hunt for Axions
The Axion Dark Matter Experiment just entered the most sensitive phase yet in its search for invisible particles to explain the universe's hidden mass
The SciencesNovember 1, 2017
Beautiful Physics: The Search for New Particles at LHCb
The Large Hadron Collider beauty experiment has seen hints of new particles that may point the way toward a higher theory of physics
Quantum PhysicsDecember 1, 2018
Spooky Quantum Action Passes Test
Recent experiments quash the hope that the unsettling phenomenon of quantum entanglement can be explained away
ChemistryMay 1, 2017
World’s Fastest Movies Capture Molecules in Motion
New movies of drug proteins or photosynthesis in action, shot in millionths of a billionth of a second, show how the molecules work—or fail
Space & PhysicsSeptember 1, 2015
Does Einstein’s Theory of Gravity Hold Near Black Holes?
General relativity has never been tested in places where the effects of gravity become truly extreme—for example, at the edge of a black hole. That will soon change
Quantum PhysicsJuly 30, 2018
String Theory May Create Far Fewer Universes Than Thought
Some physicists claim that the popular landscape of universes in string theory may not exist
Space & PhysicsApril 23, 2018
Here Come the Waves
After a clutch of historic detections, gravitational-wave researchers have set their sights on some ambitious scientific quarry
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