With the naked eye, humans can make out a detail measuring roughly 1 mm from a distance of 3 meters. Titan Krios™, the world's most powerful microscope, which will be officially inaugurated in July 2018 at the Institut Pasteur, magnifies objects millions of times (compared with just 10x for the earliest microscopes) and reveals what is happening at the atomic level. Scientists investigating diseases now have access to an entire range of highly sophisticated microscopes, which are often an essential prerequisite for their research.