What's up in
Ultra-Accurate Clocks Lead Search for New Laws of Physics
Atomic clocks are letting physicists tighten the lasso around elusive phenomena such as dark matter.
Whisper From the First Stars Sets Off Loud Dark Matter Debate
A surprise discovery announced a month ago suggested that the early universe looked very different than previously believed. Initial theories that the discrepancy was due to dark matter have come under fire.
Neutron Lifetime Puzzle Deepens, but No Dark Matter Seen
Two methods of measuring the neutron’s longevity give different answers, creating uncertainty in cosmological models. But no one has a clue what the problem is.
Galactic Glow, Thought to Be Dark Matter, Now Hints at Hidden Pulsars
A number of high-energy anomalies raised hopes that astrophysicists had seen their first direct glimpses of dark matter. New studies suggest a different source may be responsible.
Scientists Unveil New Inventory of Universe’s Dark Contents
The first major results from the Dark Energy Survey signal the start of a new era of cosmology.
Researchers Check Space-Time to See if It’s Made of Quantum Bits
The newly developed theory of emergent gravity, proposed as an alternative to dark matter, struggles in one of its first trials.