Snake handler Subhendu Malllik holds up an Indian baby cobra hatchling after it emerged from an egg on the outskirts of Bhubaneswar, India, in June. The venomous snake is indigenous to South Asia. Asit Kumar/AFP/Getty Images hide caption

itoggle caption Asit Kumar/AFP/Getty Images

Patients sit after their cataract surgeries at a hospital of the Aravind Eye Care System in Madurai, India. Reinhard Krause/Reuters/Landov hide caption

itoggle caption Reinhard Krause/Reuters/Landov

In a Healthpoint clinic in the village of Mallan in Punjab, India, lab technician Navdeep Sharma draws Suba Singh's blood sample. Part of Healthpoint's business plan is to offer cheap diagnostic tests at its clinics. Diagnosing and treating people in a single visit is one key to delivering affordable health care. Soma Vatsa/for NPR hide caption

itoggle caption Soma Vatsa/for NPR

Would you remember exactly what was in this salad more than a week after eating it?

Luciana Bueno Santos (LuBueno)/iStockphoto.com hide caption

itoggle caption Luciana Bueno Santos (LuBueno)/iStockphoto.com