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Good Data Are Not Enough

Cerro Tololo Inter-American Observatory, Chile

The Dark Energy Survey at the Cerro Tololo Inter-American Observatory in Chile is mapping the large-scale structure of the Universe traced by galaxies.

Credit: Reidar Hahn/Fermilab

This summer, I visited the Mayan city of Chichén Itzá in the Yucatán Peninsula, Mexico.

From Nature
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