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In a ‘Dark Dimension,’ Physicists Search for the Universe’s Missing Matter
An idea derived from string theory suggests that dark matter is hiding in a (relatively) large extra dimension. The theory makes testable predictions that physicists are investigating now.
Clashing Cosmic Numbers Challenge Our Best Theory of the Universe
As measurements of distant stars and galaxies become more precise, cosmologists are struggling to make sense of sparring values.
How (Nearly) Nothing Might Solve Cosmology’s Biggest Questions
By measuring the universe’s emptiest spaces, scientists can study how matter clumps together and how fast it flies apart.
Standard Model of Cosmology Survives a Telescope’s Findings
Reports that the James Webb Space Telescope killed the reigning cosmological model turn out to have been exaggerated. But astronomers still have much to learn from distant galaxies glimpsed by Webb.
Why This Universe? A New Calculation Suggests Our Cosmos Is Typical.
Two physicists have calculated that the universe has a higher entropy — and is therefore more likely — than alternative possible universes.
A Deepening Crisis Forces Physicists to Rethink Structure of Nature’s Laws
Physicists are reexamining a longstanding assumption: that big stuff consists of smaller stuff.
In Search of Cracks in Albert Einstein’s Theory of Gravity
Celia Escamilla-Rivera is combining large data sets with supercomputers to test general relativity against its little-known competitors.
Cosmologists Parry Attacks on the Vaunted Cosmological Principle
A central pillar of cosmology — the universe is the same everywhere and in all directions — is surviving a storm of possible evidence against it.