On the left side the cosmic web in the standard cold scenario, on the right side how it would look like in the Fuzzy Dark Matter model. The curved lines in both panels show how the absorption by the neutral hydrogen in the cosmic web behaves in the two models. The right curve does not agree with the data, while the left one does. Credit: Matteo Viel
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Using the light from very distant quasars to study the intergalactic space. A web that passes through infinite intergalactic spaces, a dense cosmic forest illuminated by very distant lights and a huge enigma to solve...
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