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Physicists are reexamining a longstanding assumption: that big stuff consists of smaller stuff.
Celia Escamilla-Rivera is combining large data sets with supercomputers to test general relativity against its little-known competitors.
A central pillar of cosmology — the universe is the same everywhere and in all directions — is surviving a storm of possible evidence against it.
Cora Dvorkin discovered new possibilities for what dark matter could be. Now she’s devising unorthodox ways to identify it.
Claudia de Rham showed how theories of “massive gravity” could potentially get rid of the need for dark energy.
The astrophysicist and social media phenom Katie Mack is ready to tell you about the fate of the universe.
Physicists have proposed extra cosmic ingredients that could explain the faster-than-expected expansion of space.
A photograph of the infant cosmos reveals the precise amounts of dark matter and dark energy in the universe, leaving precious little room for argument.
A study challenged the evidence for the mysterious antigravitational force known as dark energy. Then cosmologists shot back.