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The past and the future are tightly linked in conventional quantum mechanics. Perhaps too tightly. A tweak to the theory could let quantum possibilities increase as space expands.
Physicists are reexamining a longstanding assumption: that big stuff consists of smaller stuff.
When astronomers tried to confirm a signal from the birth of the first stars after the Big Bang, they saw nothing.
Celia Escamilla-Rivera is combining large data sets with supercomputers to test general relativity against its little-known competitors.
In computer simulations of possible universes, researchers have discovered that a neural network can infer the amount of matter in a whole universe by studying just one of its galaxies.
A central pillar of cosmology — the universe is the same everywhere and in all directions — is surviving a storm of possible evidence against it.
The James Webb Space Telescope has the potential to rewrite the history of the cosmos and reshape humanity’s position within it. But first, a lot of things have to work just right.
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