At a sprawling ceremonial complex in southern Mexico, archaeologists say they have identified a 3,000‑year‑old layout that appears to encode a vision of the universe in earth and stone. The site, ...
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New cosmic map revives the 'Hubble tension' puzzle
The universe’s expansion rate was supposed to be a solved problem, yet the latest high precision map of the early cosmos has pushed one of modern astronomy’s sharpest conflicts back to center stage.
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