NIBIB-funded researchers at Johns Hopkins have developed dust-sized metallic "microgrippers" to collect many tiny biopsy samples from inside the colon, esophagus, or bile duct. The “microgrippers” are released into a hollow organ via an endoscope. When the heat-sensitive microgrippers reach a certain temperature, they snap shut onto the walls of the organ to secure a small tissue sample. A magnet is then used to collect the microgrippers so that the tissue can be analyzed. Read more at www.hopkinsmedicine.org.