Featured series 
Tag: Epoch of Reionization
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Nation & World
A glimpse into the universe’s first light
Using one of the world’s largest supercomputers, high-resolution simulations were created that show 1 million galaxies forming some 13 billion years ago.
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Nation & World
New light on dark matter
Harvard-Smithsonian Center for Astrophysics researchers explore dark matter particles that may carry an electric charge, and explain why that matters.
