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25 biggest human-made structures you won't believe

Throughout history, humanity has demonstrated an insatiable desire to build bigger, reach higher, and create structures that ...
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After mapping 250,000 galaxies, the James Webb Telescope unveils the largest, sharpest dark matter map ever made

Astronomers have created the most precise dark matter map ever made using data from the James Webb Space Telescope. The map reveals previously undetected structures that do not correspond to any ...