New Microscope Reveals Living Cells

A new "label-free" technology called Interferometric Image Scanning Microscopy (iISM), developed by researchers at Stanford, is behind the latest breakthrough in viewing living cells. This method combines two existing microscopy techniques to achieve a remarkable 120-nanometer resolution without the use of fluorescent labels, which can damage cells or fade over time. The primary challenge in imaging live cells is minimizing phototoxicity—the damage caused by light exposure, which can alter or kill the cells being observed. Techniques like iISM avoid fluorescent labels, which require intense light, thus allowing for longer, more natural observations of cellular processes. Other advanced methods are also pushing the boundaries of live-cell imaging, including super-resolution microscopy that can see beyond the diffraction limit of light. Additionally, the integration of artificial intelligence and machine learning is becoming crucial for automating the analysis of the vast amounts of data generated by these powerful new instruments. On a much larger scale, the James Webb Space Telescope (JWST) is similarly revolutionizing astronomy. It recently discovered a merger of at least five galaxies that occurred just 800 million years after the Big Bang, much earlier than astronomers had previously thought possible. This ancient galactic collision was observed to be forming new stars at a much higher rate than expected for that period of the universe's history. The JWST also detected ionized oxygen being distributed into the space surrounding these merging galaxies, providing new insights into how heavy elements were spread throughout the early cosmos.