ALT image of a person looking at a camera smiling standing in front of tree with green leaves.

ALT A stream of extracellular vesicles travels through blood vessels near a tumor. Image courtesy of Stephen Boppart

ALT A field of stars glimpsed through a nebula? No, these constellations are extracellular vesicles, tiny packages carrying molecular cargo between cells. Image courtesy of Stephen Boppart

ALT Kinesiology and community health professor Marni Boppart, left, and electrical and computer engineering professor Stephen Boppart house their novel cellular cargo-tracking microscope at the Beckman Institute. Photo by Fred Zwicky

ALT The microscope uses only special wavelengths of light, with no dyes or stains. Data from multiple wavelengths can be combined to give a full picture of the properties of tissues, cells and the vesicles traveling between them. Image courtesy of Stephen Boppart