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An Italian Cosmologist Who Wanders in Dante’s Dark Wood
A scientist and programmer with a literary bent, Valeria Pettorino thinks multiple angles and diverse points of view are needed to unriddle the nature of dark matter and dark energy.
The Universe Is Not a Simulation, but We Can Now Simulate It
Computer simulations have become so accurate that cosmologists can now use them to study dark matter, supermassive black holes and other mysteries of the real evolving cosmos.
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.
Troubled Times for Alternatives to Einstein’s Theory of Gravity
New observations of extreme astrophysical systems have “brutally and pitilessly murdered” attempts to replace Einstein’s general theory of relativity.
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.