A long-lost type of dark matter may resolve the biggest disagreement in physics
A map of the sky shows the Cosmic Microwave Background (CMB), a remnant of the period of the early universe when this lost dark matter might have existed.
(Image: © ESA and the Planck Collaboration)
One of the deepest mysteries in physics, known as the Hubble tension, could be explained by a long-since vanished form of dark matter.
The Hubble tension, as Live Science has previously reported, refers to a growing contradiction in physics: The universe is expanding, but different measurements produce different results for precisely how fast that is happening. Physicists explain the expansion rate with a number, known as the Hubble constant (H0). H0 describes an engine of sorts that’s driving things apart over vast distances across the universe. According to Hubble’s Law (where the constant originated), the farther away something is from us, the faster it's moving.
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