Dartmouth College researcher Timothy Pierson holds a prototype of Wanda, which is designed to establish secure wireless connections between devices that generate data.
Eli Burakian/Dartmouth College
Sen. Charles Grassley, R-Iowa, and a Democratic colleague have introduced a bill that would require drugmakers and medical device companies to disclose payments made to physician assistants and nurses who can prescribe their products.
Brendan Smialowski/AFP/Getty Images
Bayer HealthCare, of Whippany, N.J., brought Essure to market in 2002 as a nonsurgical alternative for women seeking sterilization. Bayer acknowledges the device can lead to complications, but says they are rare.
Slum dwellers near Calcutta get their water from a municipal pipe. Water coming out of the tap on the left is for bathing and so is untreated. The blue Zimba chlorinator is hooked up to the tap on the right, which is used for drinking water.
Courtesy of Suprio Das/Zimba