<ul><li>Scientists have found that half of the missing normal matter in the universe is in the form of invisible hydrogen gas floating around galaxies in halos.</li><li>The research suggests that the hidden matter is in the form of ionized hydrogen gas that is more spread out around galaxies than previously thought.</li><li>The team used a technique to detect the presence of this gas by measuring how it scattered light from the cosmic microwave background.</li><li>The discovery of the hidden hydrogen gas provides insights into how galaxies evolve and may lead to updates in our understanding of the early universe.</li></ul>

Scientists find half the universe’s missing hydrogen hiding in giant gas halos

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