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50.0 MB (4.9 MB compressed)
5125 x 3410 pixels
43.4 x 29.0 cm ⏐ 17.1 x 11.4 in (300dpi)
MATTHEW OLDFIELD / SCIENCE PHOTO LIBRARY MATTHEW OLDFIELD / SCIENCE PHOTO LIBRARY
Inca wall. The Incas built walls with precisely cut stones that fitted together without the need for mortar. The walls were also built with an inward incline, which helped to strengthen them against earthquakes. Photographed at Pisac, Urubamba, Peru.
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