Scientists Just Detected the Oldest Dark Matter Ever Observed

This could change everything we know about the earliest history of the universe.

Scientists can look through these "lens galaxies" to see the light of even older galaxies behind them. And because dark matter interacts with gravity, the more of it there is in those galaxies, the more distortion — which is something that scientists can measure.

The team used the data of 1.5 million lens galaxies in visible light, and then used the European Space Agency's CMB-observing Planck satellite to measure exactly how the dark matter in those galaxies distorted the CMB.

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