Immune cell moving through the ear of a zebrafish while collecting sugar particles (blue)

Scientists have constructed a new microscope to make detailed 3D images of of cells and intracellular structures. With this microscope, researchers can study cells in the body (instead of on glass outside the body), and even follow them as they move through the body of a living organism. This is a majar breakthrough in microscopy, and although the new microscope is still very costly, it is expected that prices will go down and that this microscope can be used to solve questions concerning biological systems in the body, in health and disease. 

Read the full story: Howard Hughes Medical Institute
Scientific publication: Science