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The first set of results from a pioneering cosmic-mapping project hints that the repulsive force known as dark energy has changed over 11 billion years, which would alter ideas about how the Universe has evolved and what its future will be. The first set of results from a pioneering cosmic-mapping project hints that the repulsive force known as dark energy has changed over 11 billion years, which would alter ideas about how the Universe has evolved and what its future will be.

The telescope's studies could help end a long-standing disagreement over the rate of cosmic expansion. But scientists say more measurements are needed

As far as cosmologists can tell, space is almost perfectly flat. But what does this mean?

JWST data don’t resolve a disagreement over how fast the universe is expanding, suggesting we might need strange new physics to fix the tension.

<strong>The long read</strong>: Since being laid low with the virus more than a year ago, Catherine Heymans can only operate in half-hour bursts. But her work could still change the way we understand the universe