NATIONAL GEOGRAPHIC. THE END OF BLINDNESS. REVISTA EN EN COLOMBIA

National Geographic - The End Of Blindness In this Issue: On the Cover Thirty-nine million people—about one in 200—are blind, but scientists are working to help them see. Lost Empire of the Maya The Snake kings ruled a large and powerful kingdom—and then they lost it. A Cure in Sight Medical advances offer an end to blindness for some, yet many still suffer from preventable loss of sight. Heat Wave Was the Pacific’s deadly warm water just part of a natural cycle or a sign of a bigger change? Back in Fashion Fur is popu lar again, but humane treatment of the animals remains a challenge Losing the Canyon An attempt to hike the length of the Grand Canyon reveals the commercial interests threatening it. CARACTERÍSTICAS Autor: Autores Varios Editor: National Geographic Society ISSN: 0027-9358 Año: 2016 Pasta: Tapa Blanda Páginas: 148 Idioma: Inglés